Lake Merced Task Force
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Lake Merced Task Force
Lake Merced Task Force
MEMBER ORGANIZATIONS California Dragon Boat Association California Native Plant Society - Yerba Buena Chapter
California Park and Recreation Society
California Trout
City College of San Francisco
City of Daly City Department of Water and Wastewater Resources

Civilian Marksmanship Program

Committee to Save Lake Merced
Golden Gate Audubon Society
Golden Gate Heights Neighborhood Association
Greater West Portal Neighborhood Association

Lake Merced Hill Recreation and Management Association

Lake Shore Acres Improvement Club

Lakewood Tenants Association

Merced Manor Property Owners Association

Olympic Club

Olympic Club Rifle Team
Pacific Junior Rifles
Pacific Rod & Gun Club

San Francisco Beautiful

San Francisco Public Utilities Commission

San Francisco Recreation and Park Department
San Francisco Rifle Association
San Francisco State University
San Francisco Tyee Club
San Francisco Zoological Society
South End Rowing Club
State of California 12th Assembly District
The Janet Pomeroy Center
The Villas Park Merced
America True / True Youth
California Waterfowl Association
Friends of Recreation and Parks

National Park Service, GGNRA

Neighborhood Parks Council

Office of District 7 Supervisor

Office of District 8 State Senator

Office of the Mayor

San Francisco Bicycle Coalition

San Francisco Police Dept., Youth Fishing Program

Sierra Club, San Francisco Group

The California State Coastal Conservancy

USF - Athletic Department

West of Twin Peaks Central Council
Lake Merced Task Force
Lake Merced Task Force

Fisheries Community Study 

Lake Merced Task Force
  Special Thanks to: SFPUC for all the help on this project. 
In 2003 the LMTF grant committee partnered with San Francisco Beautiful, the Recreation and Parks Department and the San Francisco Parks Trust and applied for a grant from the California State Coastal Conservancy to allow us to complete four projects including a "Fisheries Community Study."

We were sucessful and in 2004 work began on a a scientific study of the lake with consultant Michael McGowan, PhD Fisheries Biologist. 

His team conducted field surveys and in 2007 completed a comprehensive report their findings which can be found here.

Lake Merced circa 1962

Crews are busy now taking samples  of fish and planton as well as  measuring water quality.

  Large bass A very healthy Large Mouth Bass

Lake Merced Task Force

          Sampling Impound Lake

Preliminary field sampling of benthos, fish, and zooplankton was undertaken on August 4 and August 10. Benthic samples were taken with a modified Peterson grab at 18 locations in the four parts of the lake: Impound, South, North, and East. Polychaetes, oligochaetes, and nematodes were found as well as fragments of arthropods (cumaceans and mysids).

Lake Merced Task Force

Fish samples were taken with a 100 ft x 10 ft beach seine in the Impound Lake and at the eastern end of the South Lake and on the southern shore of the North Lake. Centrarchids (large mouth bass), embiotocids (tule perch),  and cyprinids (minnows) were collected in the North Lake. Centrarchids (large mouth bass), cyprinids (carp and minnows), and embiotocids (tule perch) were collected in the South Lake.

Lake Merced Task Force
Lake Merced Task Force
Lake Merced Task Force
Lake Merced Task Force


Lake Merced Task Force

Zooplankton were collected with a 0.5m mouth diameter, 0.333mm mesh plankton net by vertical tow in each of the four lake basins. The small crustaceans Daphnia and copepods were present in the samples.

  Lake Merced Task Force

No fish were collected in the Impound Lake although this may have been due to disturbance in the water by a dog repeatedly fetching a tennis ball just before our sampling.

Different size classes of bass, minnows, and tule perch were present in the collections indicating that these species are reproducing in the lake. Two large carp were collected. Except for a few specimens all fish were returned alive to the lake after identifying and measuring them. The next sampling will include use of traps, long-lines with hooks, and rod and reel to collect species not yet caught such as catfish, known to occur in the lake and perhaps other species that have been reported there in the past.

Lake Merced Task Force
The Lake Merced Task Force was founded to address the deterioration and the Lake's sustainability as one of San Francisco's most valuable natural and recreational areas.
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Lake Merced Task Force
Lake Merced Task Force
Lake Merced Task Force
The Mission Statement for the forthcoming years of the Lake Merced Task Force is:

In order to insure the continued stewardship of Lake Merced the LMTF's mission is to work with community groups and local and state governments to implement programs, policies, and practices that will restore, enhance, and maintain the natural, educational, and recreational resources of Lake Merced.


The Lake Merced Fisheries Study can be downloaded as a PDF file here.  (2.7 MB)

Lake Merced Task Force