Corte Madera Creek (San Mateo County, California)

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For the creek in Marin County, see Corte Madera Creek (Marin County, California).
Coordinates: 37°24′03″N 122°14′18″W / 37.40083°N 122.23833°W / 37.40083; -122.23833
Corte Madera Creek
Corte De Madera Creek[1]
Corte Madera Creek (San Francisquito Creek) in Jasper Ridge July 2011.jpg
Corte Madera Creek just below Searsville Dam July 22, 2011
Name origin: Spanish language
Country United States
State California
Region Southeastern San Mateo County
 - left Coal Creek, Gulch Creek, Rengstorff Gulch, Damiani Creek, Jones Gulch, Hamms Gulch, Alambique Creek, Dennis Martin Creek, Sausal Creek
 - right Westridge Creek
City Portola Valley, California
 - location Russian Ridge Open Space Preserve.
 - elevation 1,950 ft (594 m)
 - coordinates 37°19′26″N 122°11′24″W / 37.32389°N 122.19000°W / 37.32389; -122.19000 [1]
Mouth Searsville Lake
 - location Portola Valley, California
 - elevation 351 ft (107 m)
 - coordinates 37°24′03″N 122°14′18″W / 37.40083°N 122.23833°W / 37.40083; -122.23833 [1]
Looking south across Searsville Reservoir from the dam on Corte Madera Creek
Shot looking southeast from Jasper Ridge's Sun Field Station up the Corte Madera Creek watershed with Russian Ridge on the right and Montebello Ridge on the left.

Corte Madera Creek (Spanish for "a place where wood is cut") is a 7.3-mile-long (11.7 km)[2] creek that flows north-northwest to Searsville Dam and then joins with Bear Creek to form San Francisquito Creek in California. Historically it was called the Corte de Madera Creek and ran through Rancho Cañada del Corte de Madera and Rancho Corte de Madera land grants (the latter surrounding the former).[3][4]


Corte Madera Creek was historically a steelhead (Oncorhynchus mykiss) stream; however, access to the creek has been blocked since 1890 by Searsville Dam.[5][6] In the spring of 1991, an adult steelhead (0.74m) was observed jumping at the base of Searsville Dam. In May 2002, the San Francisquito Watershed Council released a barrier survey including Corte Madera Creek. A private bridge apron adjacent to Willowbrook Drive and another downstream of the confluence with Damiani Creek were described as impassable barriers to upstream migrating steelhead.[6] In 2014 a systematic study of 1,400 plus dams in California identified Searsville Dam as a high-priority candidate to improve environmental flows for native fish conservation.[7]

Illegal fishing of rainbow trout (freshwater resident forms of Oncorhynchus mykiss) has occurred in several places along Corte Madera Creek with significant damage to the surviving populations of native rainbows. In addition, there are also several private ponds stocked with warm water non-native species, such as Smallmouth Bass, Redear Sunfish and Bluegill that threaten the surviving native trout population fry and eggs. The most notable pond is on Iroquois Trail and empties into Corte Madera Creek through a single outlet which floods during El Niño, or a wet winter.


Corte Madera Creek has its origin just northeast of Borel Hill in the Coal Creek Open Space Preserve (part of the Midpeninsula Regional Open Space District, and follows Alpine Road northwesterly along the San Andreas Fault to pick up Coal Creek, Rengstorff Gulch, Damiani Creek, Jones Gulch, Hamms Gulch - all draining the northeastern slope of the Santa Cruz Mountains. It levels out upon reaching Portola Valley and crosses under Portola Road at Brookside Drive. Before reaching Searsville Reservoir it arrives in a large laguna or freshwater marsh formed by the nexus of several creeks, including Westbridge Creek, Sausal Creek, Dennis Martin Creek, and Alambique Creek.

Just south of the intersection of Mountain Home Road and Portola Road, Alambique Creek enters a historic wetland pond (Lloyd's Pond) which is currently impounded by the road-fill of Portola Road and a culvert. From there Alambique Creek flows under Portola Road into the upper Searsville Reservoir at its confluence with Sausal Creek. Dennis Martin Creek flows into Sausal Creek just upstream of the reservoir area at the Family Farm Road bridge. From there Sausal Creek joins enters Searsville Reservoir. Corte Madera Creek enters Searsville Reservoir further to the east. Old maps suggest that Dennis Martin Creek and Alambique Creek were historically tributary to Sausal Creek.[8] This unique confluence of streams and natural wetlands was submerged and buried with sediment due to the construction of Searsville Dam and the siltation of the reservoir.

Below Searsville Dam Corte Madera Creek joins with Bear Creek to form San Francisquito Creek.

See also[edit]


  1. ^ a b c U.S. Geological Survey Geographic Names Information System: Corte Madera Creek
  2. ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed March 15, 2011
  3. ^ Erwin G. Gudde, William Bright (2004). California Place Names: The Origin and Etymology of Current Geographical Names. University of California Press. p. 92. ISBN 978-0-520-24217-3. Retrieved 2010-09-20. 
  4. ^ Durham, David L. (1998). Durham's Place Names of California's San Francisco Bay Area: Includes Marin, San Francisco, San Mateo, Contra Costa, Alameda, Solano & Santa Clara counties. Word Dancer Press, Sanger, California. p. 44. ISBN 1-884995-14-4. Retrieved 2010-08-30. 
  5. ^ Skinner, John E. (1962). The Freshwater Fish and Fisheries of the San Francisco Bay Area. California Department of Fish and Game, Water Projects Branch Report no. 1. Sacramento, California: California Department of Fish and Game. Retrieved 2010-09-20. 
  6. ^ a b Leidy, R.A., G.S. Becker, B.N. Harvey (2005). "Historical distribution and current status of steelhead/rainbow trout (Oncorhynchus mykiss) in streams of the San Francisco Estuary, California.". Center for Ecosystem Management and Restoration, Oakland, CA. Retrieved 2009-12-28. 
  7. ^ T. E. Grantham, J. H. Viers, PB Moyle (2014). "Systematic Screening of Dams for Environmental Flow Assessment and Implementation". BioScience. Retrieved 2014-10-27. 
  8. ^ Janet M. Sowers (2005). "San Francisquito Watershed and Alluvial Fan, in Creek & Watershed Map of Palo Alto & Vicinity". Oakland Museum of California. Retrieved 2012-02-11. 

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