Olema Creek is a 12.7-mile-long (20.4 km)[2] northwestward-flowing stream originating on the western flank of Bolinas Ridge, which is part of the Marin Hills, part of the Pacific Coast Ranges mountain system in California, United States.

The Olema Creek watershed is 99% on National Park Service lands, although 56% of this is under grazing leases.

[4] Olema Creek hosts anadromous coho salmon (Oncorhynchus kisutch) which are federally endangered Central California Coast coho salmon evolutionary significant unit ESU, and steelhead trout (Oncorhynchus mykiss) which are federally threatened Central California Coast Steelhead distinct population segment (DPS).

[6] Olema Creek coho salmon were used to genetically rescue Russian River coho salmon suffering from inbreeding depression, resulting in higher fitness of this endangered salmonid in the Russian River.

[7] Olema Creek also hosts multiple other listed species: California freshwater shrimp (Syncharis pacifica), tidewater goby (Eucyclogobius newberryi) and California red-legged frog (Rana draytonii).