The Wiggle is a one-mile, zig-zagging bicycle route from Market Street to Golden Gate Park in San Francisco, California, that minimizes hilly inclines for bicycle riders. Rising 120 feet (37 m), The Wiggle inclines average 3% and never exceed 6%. The path generally follows the historical route of the long since paved-over Sans Souci Valley watercourse, winding through the Lower Haight neighborhood toward the Panhandle section of Golden Gate Park.
The lower end of the route begins at either end of the Duboce Bikeway in the block of Duboce Avenue just west of Market Street. The elevation is approximately 100 feet (30 m) above sea level. It then moves in a zig-zag toward the northwest along Duboce Avenue, Steiner, Waller, Pierce, Haight, Scott, and Fell Streets to the Panhandle Bikeway, 215 feet (66 m) above sea level. After climbing 50 more feet, the peak of The Wiggle is reached near Stanyan Street at the peninsular drainage divide, i.e., the dividing point between surface water flowing to the San Francisco Bay on the east side and flowing to the Pacific Ocean on the west.
Bicyclists can travel The Wiggle between major eastern and central neighborhoods (such as Downtown, SoMa, The Mission District, The Castro) and major western neighborhoods (including the Panhandle, The Haight, Golden Gate Park, and The Richmond and Sunset Districts).
The route 
Below are five route-finding techniques for those who follow the Wiggle: Geography, Signage, Map, Directions and a Mnemonic trick.
Geographic route-finding 
Without memorizing streets, a simple pattern will produce the route easily. The rider or pedestrian wishing to go on the flattest route makes a turn toward the north or west each time the forward direction presents a hill steeper than the turn.
Thus, starting northbound on Church at Market or westbound on Duboce at Market this pattern will avoid all steep areas and produce a route from Market Street to the bike path in the Panhandle of Golden Gate Park and the main routes through the Park itself. Similar "wiggles" can be found using this method for reading the geography in other hill areas, though this wiggle route is known most widely.
A rider can also follow the Bike Route 30 signs from Duboce Avenue westbound (at Market Street or Church Street). In some places, the signs also read "The Wiggle." In 2011, sharrows were painted on top of green pavement marking the route, making navigation easier for cyclists and alerting drivers to the presence of cyclists.
 Google map with terrain.
Westbound starting at Market and Duboce  (google maps) or Church and Duboce, the route takes these steps...
- Duboce - Head west
- Steiner - Turn right (north)
- Waller - Turn left (west)
- Pierce - Turn right (north)
- Haight - Turn left (west)
- Scott - Turn right (north)
- Fell - Turn left (west)
Mnemonic trick 
The initial letters in the sequence of roads follows the consonants in SWaP HiS: Steiner, Waller, Pierce, Haight, Scott
you can use:
Da Small White Pigs Had Some Figs: Duboce, Steiner, Waller, Pierce, Haight, Scott, Fell. (West bound)
Fast Straight Hilly Paths Will Slay Dunces: Fell, Scott, Haight, Pierce, Waller, Steiner, Duboce. (East bound)
Geological process that created the flat terrain 
The hills adjacent to the route, on the northeast side are made of underlying serpentine rock:
- Mint Hill (known successively as Reservoir Hill, and then Clinton Mound until 1937 when the new U.S. Mint was built on it.)
- Alamo Square
Over thousands of years, the gentle valley bottom was formed through a process of gradual erosion of the soft, crumbly serpentine. This flat creek bed contained, until roads and other construction obliterated them, the intermittent stream of the creek itself and two ponds. As with all such flat valleys, the location of ponds tended to shift, but they were generally located at what is now Divisadero Street near Oak Street and at Market Street from Belcher Street to Reservoir Street—a little known public street which is currently the parking lot entry for the Safeway grocery store at 2020 Market Street. (The back of this store is located at the start of the Wiggle.) The reservoir referenced was the successor to the pond.
Human history 
Before Europeans settled in San Francisco, a route approximately following that now known as "The Wiggle" was used as a way to avoid hills while walking. An Indian village called Chutchui existed in the vicinity of Mission Dolores near the area where The Wiggle meets Market Street. The foot path went toward what is now the Panhandle and then connected to the associated village Petlenuc at the northern tip of the San Francisco Peninsula near the current site of Crissy Field.
When the San Francisco Presidio and the Mission Dolores were founded in 1776, the trail became a horseback connector eventually called "the Old Spanish Trail." In the 19th century, the trail was the commute route of military personnel who lived in the Mission District and worked at the Presidio. In the 1860s, it finally was widened to become a toll road, passable by carriages, and going by the name "Divisadero" or "Devisadero" Street. In the 1870s, a grid of streets was imposed in its place, one retaining the old road's name, across a newly formed neighborhood with all the sandy hills and steep gullies filled or scraped flat.
In late 2012 final approval was secured and construction began on the Fell and Oak Street Bikeways, which when completed will add three blocks of one-way cycle track on both Fell and Oak Streets from Scott Street to the eastern end of the Panhandle at Baker Street, connecting the Wiggle to the Panhandle. Fell Street previously had a narrow bicycle lane wedged in between parked cars and fast-moving vehicular traffic, while Oak Street had no bicycle facilities at all. The project, which also includes pedestrian safety improvements such as sidewalk extensions and bulbouts, will be accomplished by removing all parking from the south side of both streets. Construction is expected to be complete by spring 2013.
- In 1994 Tubular Times (1994) printed an article on The Wiggle
- Map of The Wiggle (with terrain and elevation contour lines at 40-foot intervals) in Google Maps 
- MapMyRide charted popular route to the De Young Museum of Art in Golden Gate Park from near Market Street 
- Map of all official San Francisco bike routes with grades and other data (PDF) 
- Flora of the Santa Cruz Mountains of California: A Manual of the Vascular Plants by John Hunter Thomas, page 3 
- San Francisco's Thoroughfares by Edward A. Morphy, pages 473-5
- Lekach, Sasha (16 October 2012). "SFMTA Approves Plan To Slow Traffic Along Fell And Oak Streets". SF Appeal. Retrieved 13 December 2012.
- Bialick, Aaron (17 October 2012). "SFMTA Board Approves Fell and Oak Bikeways, Work to Begin This Month". Streetsblog San Francisco. Retrieved 13 December 2012.
- The Wiggle in Wikispot SF
- San Francisco government traffic calming plans for The Wiggle area.
- Natural history tour of The Wiggle presented by the author of the first article popularizing the term "The Wiggle".
- turn by turn directions at citysearch.com
- Twin-Peaks-Wiggle-Loop map of The Twin Peaks Wiggle Loop.
- Listing in Bay Guardian's "Best of the Bay"
- Tubular Times original layout with map on tearsheet of 1994 article about The Wiggle
- The 340-foot-long (100 m) Duboce Bikeway Mural, where the wiggle starts, and in which the Sans Souci Creek is depicted with the names of the current streets visible in and on the water
- Music Video describing the Wiggle made by The Real Numbers
- The Wiggle Of Least Resistance, a 2012 New York times piece by Robin Sloan