Spreckels Lake

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Model 'free sailing' yacht on Spreckels Lake
Watching a fast electric on Spreckels Lake - June 2, 2013
A big-boat enthusiast wipes down his boat, a SEGAD, after an early afternoon's successful run, January 19, 2013

The Spreckels Lake Model Yacht Facility, commonly referred to as 'Spreckels Lake,' is an artificial reservoir and adjoining clubhouse situated on the northern side of San Francisco's Golden Gate Park. Completed in mid-March 1904,[1] the reservoir was built for the use of model boaters of all ages, interests and skill levels, designed specifically for racing model sail and power boats and to propagate the skills and crafts necessary to build and sail competitive model boats of all types. The Spreckels Lake Model Yacht Facility is considered one of the finest examples and one of the most beautiful of the naturalistically styled, manmade model boating facilities in the world and is always open to anyone wishing to sail its waters with few restrictions. The facility is also the permanent home to the San Francisco Model Yacht Club (SFMYC), the organization at whose request[2] Spreckels Lake and the adjoining clubhouses were built and whose history is and always will be irrevocably intertwined with the history of the facility.

The Spreckels Lake Model Yacht Facility[edit]

Park Commissioner Adolph B. Spreckels

The lake[edit]

Spreckels Lake is an artificial, clay-lined, reservoir holding around 7.8 million gallons (23.94 acre feet/29,530,000 liters) of water[3] behind an earthen dam that forms its western edge, walkway and the 36th Avenue roadbed which crosses the top of the dam after entering Golden Gate Park at Fulton Street. Situated between 36th Avenue and 31st Avenue to the east, on the north side of the Park between Spreckels Lake Drive and Fulton Street to the north, and John F. Kennedy Drive to the south making it part of San Francisco's famed 49-Mile Scenic Drive, the lake is named for sugar-fortune heir[4] and San Francisco Parks Commission President Adolph B. Spreckels,[5] at a meeting of the Park Commissioners on Friday, January 29, 1904 over the objections of Spreckels who had wanted it called the "Model Yacht Lake," but whose donation of the surrounding land extending from about 25th Avenue westward to the edge of park at the Great Highway prompted the other Commissioners to name the lake in his honor.[5]

Designed specifically for model boating and measuring approximately 950 feet (east–west) by 420 feet at its widest, the irregularly shaped "Model Yacht Lake" began being filled with water pumped into it from the underground aquifers near Ocean Beach by the "Dutch Windmill on January 14, 1904 when Spreckels and Park Superintendent John McLaren "supervised the adjustment of the valves."[6] The new lake was filled and judged completed by late February or early March of that year[7] and the lake model yachting facilities officially opened a little under a month later on Sunday, March 20.[1]

Spreckels Lake is the only San Francisco lake which currently allows any model boating without special permits from the San Francisco Recreation and Parks Department (SF Rec. & Parks) under their interpretation of the law.[8] Anyone may sail most types of model boats on Spreckels Lake with few restrictions.

Since its construction, Spreckels Lake has been home to the San Francisco Model Yacht Club (SFMYC) whose application to the Park Commissioners in 1902[2] for a dedicated model boating site other than the crowded Stow Lake resulted in the creation of Spreckels Lake. The SFMYC has sailed various kinds of model watercraft on it continuously since before the day it opened.

Vintage postcard of the northwest corner of Spreckels Lake, c1904/05, looking north toward 36th Avenue and Fulton Street on left with the boats of the SFMYC. Note the Lake edge construction and slope.


Originally budgeted at $21,000 in late January 1903 by the Park Commissioners,[9] the as yet unnamed lake was built over the next 13 months with a 'natural', sloping shoreline and wooden retaining wall covered with fist- to foot-sized rocks to stabilize the soil and resist erosion. Spreckels Lake's wooden, pile-driven side-walls were later redesigned and retrofitted sometime during the 1930s with the current concrete system[3] which was built directly over much of the original shoreline, burying it under raised back-fill and raising the water level of the lake. This also softened the original contours of the lake better suiting the operation of the types of 'sail-driven,' self-guided yachts then, and still used, by the SFMYC. This combination of vertical edging and approximately 36-plus-inch depth at the bank allows these deeply keeled yachts to approach all the way to the lake edge while remaining afloat. When drained, much of the reservoir's original contour can again be seen outlined by the original rocks.

The original packed-earth walkway, which can be seen in the old postcards and photos of that era, was replaced at the same time with an asphalt-paved walkway surrounding the lake atop earthen backfill behind the retaining wall. Over the past 30 years, however, the walkway has increasingly suffered from subsidence of the soil beneath the asphalt and repairs have required draining the lake on more than one occasion to shore up or patch the foundation of the retaining wall where it has been undercut. In 2013, a substantial portion of the southeastern bank, about 160 feet in length, had to be completely demolished and replaced with a new, reinforced, deep foundation retaining wall; however at least one other area of the walkway and old wall now shows similar early signs of distress, cracking and collapse.

The depth of the reservoir in 2013 is between three to five feet around the edge to around six feet or so at the deepest in the middle of the eastern portion of the Lake. The bottom away from the older hard-pack soil close to the sides, is a layer of accumulated fine silt and organic detritus probably two or more feet thick which contributes to the murkiness of the water and gets a bit thicker every year. Model boats that sink in the lake may actually submerge into this heavy muck and may become irretrievable by most methods short of hiring a diver. Visibility in the lake's water is usually measured as a matter of a few inches.

Secondary purpose[edit]

The lake also serves as a gravity-fed source of non-potable, fire-fighting water for the local neighborhood should San Francisco's main and backup fire-fighting water supply systems ever fail, the lake water can be tapped through three green and blue, color-coded hydrants located on Fulton Street on the south side of the intersections of 30th, 34th and 36th Avenues.

The drainage inlet pipe (from Stow Lake), Spreckels Lake


The water in Spreckels Lake is a murky, algae-laden, non-potable mix of mainly ground water from the Park's deep wells and some surface water drained from Stow Lake, not, as commonly believed, reclaimed water. The drainage from Stow Lake enters the lake via a five or six-inch pipe from under the lake’s normal surface level at the far eastern end of the lake and is mainly used to keep a stable water level for Spreckels Lake and has a flow of about 120 gallons a minute when fully opened. A second, smaller inlet beneath the surface on the south shore near JFK Drive allows large volumes of groundwater to be pumped directly in to the Lake from the Park's high-pressure pumping station.[3]

In normal circumstances, the water exits the lake via an overflow-style drain in the extreme western end of the lake near the Concrete Turtle in the area known to the model yacht club members as “Turtle Cove.”

When the lake is being drained, a pair of grated, submerged drains in Turtle Cove and a single open drain about 15 feet out from the lake’s north shore lead to the Fulton St. hydrants mentioned previously. This gravity-fed system will empty about half the lake’s water over about a five-day period before the level drops enough to expose the drains. If work requires the lake to be lowered further still, SF Rec and Parks will bring in gasoline powered pumps.

SF Rec. and Parks has endeavored when possible to leave enough water in the deeper areas of the east end of the lake so even with evaporation, the larger fish and turtles that populate the lake will survive the experience.

The clubhouses[edit]

Also part of the Spreckels Lake Model Yacht Facility is the SFMYC's second and current clubhouse which serves as meeting hall, storage facility, workshop and library. It stands on the western side of 36th Avenue at the intersection of 36th Avenue and John F. Kennedy Drive. The structure was built by the Works Progress Administration (WPA) for the use of the club in perpetuity using a combination of federal money, donations raised by private subscription and help from San Francisco city government.

The structure’s red-tiled roof and concrete building with wooden, high-ceilinged interior reflects the WPA-era fusion of Mission Revival and Craftsman-style architectures that matches other buildings in the area including the Police Stables across JFK Drive to the south.

The current clubhouse replaced an earlier building salvaged by SFMYC members and the City of San Francisco from the remnants of the ‘little’ St. Francis Hotel after its removal from Union Square. It was rebuilt near the proposed but never built Polo Fields Stadium site[10] with a budget of $16,000[11] in 1909 and served the Club until they moved to their current building in 1938.

The clubhouse is open to the public on a request basis or if accompanied by a key-holding member of the model yacht club.

There are exterior entrance washrooms, men's on the north side of the building and women's on the south until 7 pm local time.

Model boaters move to Spreckels Lake[edit]

Model yachting, in a more organized sense, seems to have reached the San Francisco Bay Area sometime during or after the early to mid-1870s. Early traditions tell of open-water model sailing competitions on San Francisco Bay held between the boardwalk of Miegg's Pier and Goat Island (Yerba Buena Island)[10] as well as on Lake Merritt and Richardson Bay.

Model boaters were among the first people to take advantage of the newly opened Stow Lake in 1893 as a venue for their models. Less than a decade later in 1902 the model yachtsmen, represented by the San Francisco Model Yacht Club (formed 1892), citing crowded conditions and consequent friction at Stow Lake, petitioned the Parks Commission, of which Adolf B. Spreckels, was part, to create a "model yachting lake" within Golden Gate Park pointing to the model boating facilities found in European and East Coast parks where model boat racing competitions drew large crowds.[2]

The San Francisco Model Yacht Club moved from Stow Lake to its new home on Spreckels Lake even before the lake opened, immediately setting up an 1800-foot, two-length race course still in use today and holding its first racing event there on Sunday, February 28, 1904 as soon as the only partially filled Lake contained the minimum four feet of water required to successfully float and race their boats. The first boat to win on the new lake was then club Vice-Commodore Henry London's "Imp," the "Sautee," owned by L. S. Adams finished second.[7][12] Spreckels Lake would officially open 28 days later on Sunday, March 20, 1904 when the club also held its first opening day regatta on the lake.[1]

Model boating enthusiasts of all ages still flock to the lake to run their boats as it is now, quite literally, known "around the world" and an event venue of some renown within the greater model boating community. In addition to many individual model boaters, the most prominent and organized group using the lake on a regular basis is still the SFMYC but there are others as well. The "Spreckels Irregulars" are a loosely affiliated, informal model power boating group who are very active at the lake and includes a couple SFMYC members, but the "Spreckels Irregulars", in general, do not wish to associate with the SFMYC for various reasons. The Northern California Wheeler yacht fleet has recently begun to hold at least one local series regatta there annually. Some members of the Western Warship Combat Club also frequent the lake although with empty magazines and safeties engaged.

The lake has also been the site of a number of regional and national championships under the auspices of the American Model Yachting Association (AMYA). Historically, the North American Model Boat Association (NAMBA) has also held a number of events at the lake including a number of racing competitions for high-speed, gas-powered boats such as the Selby Cup(an international open event) for .35 outboard hydroplanes. The Club was a pioneer of the .35 Outboard class though its membership, especially Jay Selby, and was, in a great part, responsible for its establishment as an accepted racing class.

The San Francisco Model Yacht Club (SFMYC)[edit]

The San Francisco Model Yacht Club for whom the lake was built regards Spreckels Lake its home waters and the history of the lake and model yacht club become inseparable as neither would exist without the other.

In addition to regional and nation co-sponsored events and regattas, the SFMYC sponsors a full calendar of club and open events for power and sail on the Lake. A number of these were or have become well known to other modelers as well as having been historically important or seminal modeling events such as the "Bart" and "Dickie" Cup Regattas for sailors and Golden Gate Scale Concours (d'Elegance), Wooden Boats on Parade and the Golden Gate Outboard Regatta for power boats.

On the down side, some members of this club are known to treat the lake as a private fiefdom and have a history of harassing or bullying the public when members of the public who break those member's perceptions regarding the 'proper' usage of the lake, park regulations or club rules, or the unwritten lake 'etiquette.'[13] The club is slow or refuses to take action to discipline these members even though it allegedly has rules against this kind of behavior.

1990s to current sign stating SF Rec and Parks rules for Spreckels Lake Model Yacht Facility
1970s era sign stating SF Rec and Parks rules for Spreckels Lake Model Yacht Facility. The sign is now missing, apparently stolen.

Rules governing model boats using the model yacht facility.[edit]

Spreckels Lake is usually open to everyone to enjoy year round as long as the overall park itself is open. Anyone interested can walk, run, loaf, watch or sail any boats as they wish. From time to time, the San Francisco Model Yacht Club may cordon off certain areas for special events or regattas but there is almost always plenty of room for other modelers to set-up and run in other areas of the walkway and lake.

The exceptions are that during marathons and festivals such as the San Francisco Marathon,[14] the Outside Lands Music and Arts Festival[15] or the Hardly Strictly Bluegrass Festival[16] vehicle access to the lake is closed and the lake itself maybe fenced off by event organizers.

SF Recreation and Parks Dept Rules[17][18][edit]

  1. Internal Combustion (IC) and Nitro powered boats may be operated on the lake from 10 am to 1 pm Tuesdays, Thursdays and Saturdays only. Sail boats shall have full access of the lake at all other times.
  2. IC and Nitro powered boats must not be operated at speeds in excess of 15 MPH and must not exceed a decibel noise level of 60 at full throttle at 50' from the meter on shore.
  3. All local and state laws must be observed in the interest of safety.
  4. Powered boats are to steer clear of all wildlife on the lake.
  5. No more than two IC or Nitro powered boats may be operated on the lake at any one time.
  6. IC/Nitro powered boats shall be run in a clockwise direction and remain outside of the far-east and far-west ends of the lake.
  7. Radio frequency flags must be properly displayed on antennas whenever in use.

The Recreation and Parks rules also set apart a specific portions of the lake where fast, internal combustion powered model boats are forbidden to run, to wit: from a point on the mid-south shore of the lake to a point 75 feet from shore as marked by a buoy to the center of the jetty that extends into the lake from the western shore of the lake.[19] This area is restricted to slow scale and steam boats running under 5 MPH[19] and is now usually cordoned off by red and white buoys. Other than staying out of the cordoned-off area when scale or steam boats are using the lake, there are no other restrictions or speed limits restricting the public's use of the lake.

Internal combustion powered boats are also forbidden to run on the northern side of the lake to keep from creating noise issues with the neighborhood bordering on Fulton Street.[20]

The 'club rules' of the San Francisco Model Yacht Club are not binding and cannot be enforced against members of the public.

Lake wildlife[edit]

Ol Br'er Turtle, a large red-eared slider (Trachemys scripta elegans) suns himself on a rock, August 2013.
A Great Egret (Ardea alba), hunts the shallow water in a partially drained Spreckels Lake. Note the Harley frame poking its kickstand out of the water. - August 2013
A heron (species unknown) hunts the shallow water at Spreckels Lake, - June 27, 2013

The 'ecology' of Spreckels Lake is entirely artificial yet is home to a number species of birds, a temporary resting place for some species of migratory waterfowl and game-birds, as well as some aquatic species, and various species of fish and turtles. The surrounding trees are good habitat for squirrels and other foragers as well as hunting territory for predatory species such as heron and coyote.

Note: Pets must be kept on a leash at Spreckels. Not only because of Park rules, but because to coyotes, large dogs are competitors in their hunting grounds or interlopers in their cubbing territory, and small pets are dinner for the cubs.

Birds known to habituate to the lake in addition to feral pigeons and seagulls include common ducks and mallards, coots, grebes, swallows, cormorants, heron and egrets and, occasionally, domestic geese. Seasonal waterfowl seen to use the lake as a resting stop-over during migration include migratory ducks and Canadian Geese.

Aquatically, the lake's algae-laden water hosts minnows, sticklebacks and carp. Wild carp up to around 24 inches in size also inhabit the lake, though some appear to be discarded goldfish or koi that have managed to survive. There is a 'tradition' of dumping goldfish in many of Golden Gate Park's lakes, sometimes by the bucketfuls, for good luck as well as a means of 'freeing' unwanted pets.

The lake also supports a fairly robust colony of turtles of various species. Most appear to be red-eared sliders, a non-native species originally from the southern United States that was extremely popular as a children's pet. At least a couple turtles living in the lake do not display the red markings typical of the red-eared slider and may be western painted turtles, a native species. There is at least one large (12 to possibly 14-inch) soft shelled turtle of unknown species also living in the lake. Most of the turtles were probably introduced to the lake as discarded pets though a thriving population of turtles was noted as far back as 1912.

There seem to be some freshwater clams, probably dropped by seagulls and, at least historically, crawfish.

There used to be a small population of cats composed of "'outside' house-pets," discarded pets and ferals, though they are now rarely seen, possibly due to predation by the coyotes that recently have moved into the park after crossing the Golden Gate Bridge from Marin County as early as 2004.[21] or 2001.[22] One coyote was photographed dragging off a heron it had taken near the area late in Spring 2013, by a local wildlife photographer.

The herons in turn find the many pocket gophers that borrow in the grass surrounding the lake quite tasty.

Periodic fish kills[edit]

Due to the algae-laden water, the overall shallow depth of the lake due to built-up silt and sedimentation and the general low rate of exchange of the lake's waters the lake is almost always murky with very low visibility. When the conditions are right; warm, still, shallow water, usually during a summer or 'Indian-summer's' periodic bright, heat spell, the lake can suffer an algal bloom, resulting in deteriorating conditions and deoxygenated water, triggering a suffocation die-off of fish and other water-breathing animals. This is one reason for the aeration system in the lake, to both oxygenate and stir the water. The lake, however, will need to be fully restored, mostly likely including being dredged, for a long-term solution to be found.[23][24][25]

Wildlife/model boat coexistence[edit]

The Herdsman Lake Paper[edit]

"The Effects of Model Power Boats on Waterbirds at Herdsman Lake, Perth, Western Australia," Bamford, Davis & Vandelft, 1990 [26]

The single, peer-reviewed and published, scientific study examining the effect of high-performance internal combustion model racing boats operating in close proximity to waterbirds[26] was done by observing effects on the resident waterbird population of Herdsman Lake in Perth, Australia where the boats involved were significantly louder and much faster than anything allowed on Spreckels Lake and found, to quote the paper: "that the use by waterbirds of those parts of Herdsman Lake used for racing model power boats remained at a level comparable with that of other parts of Herdsman Lake. We consider that the racing of model power boats, at its present levels of intensity and frequency, is not detrimental to waterbirds in the long term. On days when model boats were using the lake, some species vacated the lake, some moved to other parts of the lake and some sheltered in rushes while model boat racing was in progress. Numbers of waterbirds returned to pre-boating levels once the boats left."

This parallels the anecdotal observations of made by long-time users of Spreckels Lake who indicate the lake birds generally move to either the shore or comparatively larger unused portions of the lake when fast or noisy boats are operating, then swiftly return after noisy or fast models leave the surface.

Deliberate harassment of the wildlife, with a model or other means is forbidden under SFMYC club rules, illegal under SF Rec and Park rules, the San Francisco Municipal Code, and state and federal statutes as well.

It is illegal to feed the birds at the lake.[17][27]

Restoration of the lake[edit]

As of May 2013, any restoration efforts made to the lake of the last 20 years have, with the exception of the addition of the aeration system, mainly been patches, done in a piecemeal fashion for an number of reasons, lack of sufficient funding apparently being a leading factor.[24] Monies were voted to restore all the lakes, but the project has apparently bogged down in delays dues to unexpected complications and issues with other lakes such as North Lake and Mountain Lake.

Issues currently affecting the lake needing to be addressed include:

  • Deterioration, subsidence and consequent cracking of the surrounding walkway and retaining wall that contain the lake resulting in cracking of the asphalt.
  • Replacement of aging lake edging.
  • Removal of trash items such as motorcycle frames, fire extinguishers, shopping carts etc., from the lake bed.
  • The accumulation of silt and other detritus raising the level of the lake bottom leading to the type of conditions that can trigger fish kills.
  • Removal of the bird droppings.
Droppings from seagulls and feral pigeons make this a constant, year-round issue but during the migratory seasons especially, Canadian Geese fowl the walkways making it difficult to walk and leading some locals to refer to one area as "Guano Point." The high-nitrate droppings also affect the quality of water when washed into the lake by rain or clean-up efforts.
  • Bird feeders who attract and sustain the feral bird populations and whose leavings also affect the quality of lake water.
  • Maintenance or replacement of the two compressors of the reservoir's aeration system as needed and keeping the bubbler lines clear and above the mud.
  • Overall water quality of the lake.

Retaining wall and walkways; June–August 2013[edit]

Spreckels Lake, looking south. The lake is drained and undergoing partial reconstruction of the southwast edge containment wall due to subsidence of the older wall by lake water.

June–August 2013: Spreckels Lake was drained to the point where it was just habitable for the fish and turtles so a section of the southeastern walkway and retaining wall could be demolished, removed and replaced with a modern, rebar-reinforced, concrete retaining wall with a large integral foundation dug into the earth below the lake bed. The older wall remaining that contains the lake waters is very lightly reinforced with two or three horizontal pieces of old rebar, does not have any real foundation in the modern sense and probably rested directly on the lake bed when it was built. Unfortunately now in places, some of the old wall doesn't even rest on the lake bottom but hangs off the asphalt walkway supported by the back filled earth which is being washed out from under the wall by the lake's waters. These areas are already showing kind of signs of the progressive failure that necessitated the replacement of the southeastern section.

Other activities at Spreckels Lake.[edit]

  • Weekly T'ai chi classes are held along the western shore of the Lake near Turtle Cove.
  • The surrounding walkway is a favored walking and light-exercise area for the neighborhood.
  • In recent years Spreckels Lake has also attracted model aviation enthusiasts who fly small, comparatively low-power, electrically (battery)-powered "toy" and "park flyer" class model floatplanes and a few quadcopters as it is one of the few areas, from the model aviators' point of view, on the San Francisco Peninsula providing both an adequate open flying area somewhat sheltered from the wind by surrounding trees and without people moving unsafely under the mid-lake aircraft flight area (a 50-foot horizontal separation from obstructions or spectators other than the pilot is usually observed). Some members of the model yacht club vigorously dispute this position and are currently engaged in efforts to ban all model aircraft from park property around the lake. Since the SFMYC does not see aircraft as an in any way legitimate use of the lake, there have been no efforts supported by the club to engage the flyers in discussions while the club continues to attempt to have all aircraft banned from Rec & Parks property.
It is already illegal to fly liquid (gasoline or "nitro") fueled aircraft on park[28] or port[29] property.
  • Historically, the lake was the venue for swimming competition during San Francisco's Portolá Festival, October 19–23, 1909[30]
  • The Outside Lands Music and Arts Festival takes place annually in August and is centered at the Polo Fields directly south from Spreckels Lake across John F. Kennedy Drive. Access to the lake is restricted during the run of Outside Lands.
Golden Gate Park and Spreckels Lake just right of center below the oval Polo Fields seen from the air looking to the south.


  1. ^ a b c "Miniature Yachts Race on Spreckels Lake Waters" San Francisco Call, Volume 95, Number 112, March 21, 1904
  2. ^ a b c no byline (August 30, 1902). "Yachtsmen Plan Long Cruises On Coming Holidays". The San Francisco Call Vol. 92 No.1.(San Francisco [Calif.]) (Chronicling America: Historic American Newspapers. Lib. of Congress.). p. 4. Retrieved August 7, 2013. 
  3. ^ a b c Rec & Park mng't - anon (unpublished). (Interview).  Check date values in: |date= (help); Missing or empty |title= (help)
  4. ^ "Adolph B. Spreckels". Press Reference Library (Southwest Edition): Notables of the Southwest. The Los Angeles Examiner (Los Angeles). 1912. p. 341. OCLC 365099589. Retrieved January 6, 2011. 
  5. ^ a b "Name For The New Lake". San Francisco CALL. January 30, 1904. Retrieved 25 November 2013. 
  6. ^ "Water Turned Into New Model Yacht Lake". San francisco CALL. January 15, 1904. Retrieved 25 November 2013. 
  7. ^ a b "Model Yachtsman Find New Lake a Success" - San Francisco Call, Volume 95, Number 96, Saturday, March 5, 1904
  8. ^ "San Francisco Park Code SEC. 3.06. LAUNCHING BOATS PROHIBITED. ...<clip>... This Section shall not apply to the launching of toy or model boats". Retrieved August 9, 2013. 
  9. ^ "Model Yachts to Race on New Body of Water". San Fancisco CALL. January 25, 1903. Retrieved 25 November 2013. 
  10. ^ a b "Model Yachts and Footsore Sailors" SF CALL Newspaper, Sunday October 6, 1912
  11. ^ Municipal Journal and Engineer, Volume May 26, 26, 1909, p. 960
  12. ^ "Yachts Will Sail On Spreckels Lake" - San Francisco Call, Volume 95, Number 68, Saturday, February 6, 1904
  13. ^ anecdotal evidence/witnessed confrontations
  14. ^ "The San Francisco Marathon". Retrieved August 8, 2013. 
  15. ^ "The Outside Lands Music and Arts Festival". Retrieved August 8, 2013. 
  16. ^ "Hardly Strictly Bluegrass". Retrieved October 11, 2013. 
  17. ^ a b Quoting SF Rec. & Parks Dept signage posted at Spreckels Lake pursuant to SF Parks Code Sec.3.02
  18. ^ "SF Park Code 3.02 SIGNS TO BE OBEYED. - No person shall willfully disobey the notices, prohibitions or directions on any sign posted by the Recreation and Park Commission or the Recreation and Park Department". Retrieved August 7, 2013. 
  19. ^ a b Golden Gate Park Commission Resolution 15818, enacted September 20, 1990
  20. ^ SF Rec & Parks sign posted on north side of lake
  21. ^ .http://blog.sfgate.com/stienstra/2013/06/24/coyotes-thriving-in-golden-gate-park/
  22. ^ http://www.huffingtonpost.com/2011/03/11/san-francisco-coyotes-wel_n_834831.html
  23. ^ Dimmick, Carol (August 2002). "Rare Algae Bloom Kills Hundreds of Fish at Spreckels Lake". Sunset Beacon. Retrieved August 8, 2013. 
  24. ^ a b Dimmick, Carol (October 2002). "North Lake Repair Delays Cause Costs to Balloon, The Richmond Review". Retrieved August 8, 2013. 
  25. ^ Sciacca, Peter (September 3, 2003). "Golden Gate Park's Stow and Spreckels Lakes to be Restored, The Richmond Register". Retrieved August 8, 2013. 
  26. ^ a b "The Effects of Model Power Boats on Waterbirds at Herdsman Lake, Perth, Western Australia" by AR Bamford, SJJF Davies and R Vandelft, 1990 - http://www.publish.csiro.au/paper/MU9900260.htm
  27. ^ "San Francisco Police Code, Article 7, Section 486". American Legal Publishing Corporation. Retrieved August 7, 2013. 
  28. ^ "San Francisco Park Code, Sec. 4.01 Disorderly Conduct (d) Carry or use a model airplane which is powered by liquid fuel or designed to be used with such fuel;". Retrieved August 7, 2013. 
  29. ^ "San Francisco Port Code Sec. 3.1. Disorderly Conduct (D) Carry or use a model airplane which is powered by liquid fuel or designed to be used with such fuel;". Retrieved August 7, 2013. 
  30. ^ Hauser, Herbert (Sunday, October 17, 1909.). "Amateur Sports Fill Each Day OF Festival". San Francisco Call Sunday Magazine, Chronicling America: Historic American Newspapers. Lib. of Congress. p. 48. Retrieved August 7, 2013.  Check date values in: |date= (help)

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