The vegetation on the 73-acre Napa River Ecological Reserve has been classified as valley oak-bay riparian forest. The dominant trees are valley oak. The understory varies from brushy to grassy with dominance by common snowberry, Himalaya berry, and Santa Barbara sedge. The Napa River serves as an upstream migrant route for adult steelhead and downstream spring migration of the juvenile and adult steelhead. In addition to once historically numerous steelhead, there is a warmwater fishery as well that includes bluegill, green sunfish, western sucker, and other fish documented from the system. Many bird species occur in the reserve.
For more information, call the Bay Delta Region Fairfield office at (707) 428-2002.