californica), Pacific madrone (Arbutus menziesii), western sword fern (Polystichum munitum), California blackberry (Rubus ursinus) and redwood sorrel (Oxalis oregana) are commonly found.

[7] Black-tailed deer, coyotes, raccoons and a wide variety of other mammals common to the surrounding area utilize Redwood Creek and the habitats found in its watershed year-round.

Redwood Creek provides ample shade and cool, consistent flow through the summer, a rarity in the hills of Contra Costa County.

The tall redwoods provide ideal locations for songbirds such as the hermit thrush, Bewick's wren, northern mockingbird and a variety of finches, jays and sparrows, both resident and migratory.

[10][2] Rainbow trout are native to many of the perennial streams of the San Francisco Bay Area, though they are currently extirpated from the majority of watersheds in the region as a result of land use changes, pollution and residential development throughout the 20th century.

A report conducted by Dr. Robert E. Leidy for the Center for Ecosystem Management, titled Historical Status and Current Distribution of Steelhead/Rainbow Trout in Streams of the San Francisco Estuary, California, stated that:Redwood Creek has value as a nursery for immature fish as well as providing spawning habitat.