Arroyo Simi

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Arroyo Simi
Arroyo Simi seen from Frontier Park.
CountryUnited States
Physical characteristics
 - locationCorriganville Park, Simi Valley
 - location
Merges with Arroyo Las Posas in Moorpark, discharges to the Pacific by Mugu Lagoon
Length19 mi (31 km)[1]
Basin features
River systemCalleguas Creek
 - leftRunkle Canyon- and Bus Canyon Creeks, and Erringer Drain
 - rightAaamos Canyon-, Dry Canyon-, Tapo Canyon-, Las Llajas Canyon-, and White Oak Creeks, and North Simi Drain

The Arroyo Simi (Spanish for "Small Stream of Simi",[2] sometimes also referred to as Simi Creek)[3] is a 19-mile (31 km)[1] westwards-running[4] creek, running from the city of Simi Valley and crosses the valley from east to west, before entering the city of Moorpark.[5] It originates at Corriganville Park by the Santa Susana Pass,[6] and streams westwards into Moorpark where it merges with Arroyo Las Posas by Hitch Road.[1] It extends for 12 miles (19 km) through the Simi Valley,[7] and leaves the city limits by Oak Park at the western end Simi Valley, and continues for seven miles in Moorpark. It is a tributary to the Calleguas Creek, which enters the Pacific Ocean by its estuary at Mugu Lagoon by Naval Air Station Point Mugu.[8] Besides an arroyo, it has been described as a channel, waterway,[9] river, drain,[10] wash,[11] and stream. Arroyo Simi drains an area of 343 square miles in southern Ventura County.[4] In its natural state, it is an ephemeral creek, which is only seasonally filled during winter time and periods of heavy rain. Today it is for the most part a concrete lined water drain that flows year round.[3][4] Tributaries to the Arroyo Simi includes Aaamos Canyon-, Sycamore-, Dry Canyon-, Tapo Canyon-, Las Llajas Canyon-, White Oak-, Runkle Canyon-, and Bus Canyon Creeks, as well as the Erringer Road- and North Simi Drains.[12]

Arroyo Simi Greenway is an ongoing construction project by the City of Simi Valley in order to increase the recreational use of its river parkways. The project includes new paved hiking- and biking trails along the Arroyo Simi, exhibit signs, sixteen new trail entries, and more.[13][14][15] The area is administrated as the Arroyo Simi Bike Path by the Rancho Simi Recreation and Park District (RSRPD).[16] It is home to native flora,[17] fish, and avifauna. It is home to fish species such as the brown bullhead, green sunfish, bluntnose minnow, and mosquitofish.[18] It is an important habitat for various species of freshwater-nesting birds in the Simi Valley. Some of the species include the great blue heron, white-faced ibis, black-crowned night heron, green heron, black-necked stilt, great egret, snowy egret, belted kingfisher, black phoebe, killdeer, common yellowthroat, greater yellowlegs, American coot, and mallard.[19]


  1. ^ a b c (Page 1)
  2. ^ Darton, Nelson Horatio (1915). Guidebook of the Western United States: Part C. The Santa Fe Route with a Side Trip to the Grand Canyon of the Colorado, Parts 3–4. U.S. Government Printing Office by the U.S. Department of the Interior. Page 102.
  3. ^ a b Appleton, Bill (2009). Santa Susana. Arcadia Publishing. Page 27. ISBN 9781439638200.
  4. ^ a b c
  5. ^ Schad, Jerry (2009). Afoot and Afield: Los Angeles County: A Comprehensive Hiking Guide. Wilderness Press. Page 253. ISBN 9780899974996.
  6. ^ (Page 2) Archived January 23, 2016, at the Wayback Machine
  7. ^ "RSRPD Arroyo Simi Greenway Update". Archived from the original on 2015-06-23. Retrieved 2015-06-08.
  8. ^
  9. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2016-01-23. Retrieved 2015-06-08.CS1 maint: Archived copy as title (link)
  10. ^ "One Pragmatic Path : Aesthetics of Arroyo Simi Bicycle Route Prove Secondary to Its Utility as a Way Around Town – latimes". 1992-07-10. Retrieved 2015-06-08.
  11. ^ Moreira, Gabrielle (2014-04-04). "Paving a path to the Arroyo greenway |". Simi Valley Acorn. Retrieved 2015-06-08.
  12. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2015-06-23. Retrieved 2015-06-08.CS1 maint: Archived copy as title (link)
  13. ^ Simon, Melissa (2015-04-10). "Arroyo greenway makes progress |". Simi Valley Acorn. Retrieved 2015-06-08.
  14. ^…4618
  15. ^ Rachel McGrath (2014-07-02). "Arroyo Simi Greenway taking shape". VC-Star. Retrieved 2015-06-08.
  16. ^ "RSRPD Arroyo Simi Bike Path". Archived from the original on 2015-06-11. Retrieved 2015-06-08.
  17. ^
  18. ^ (Page 30). Archived January 23, 2016, at the Wayback Machine
  19. ^ (Pages 30–33). Archived January 23, 2016, at the Wayback Machine