The mixed understory includes tan oak, madrone, red alder, big leaf maple, and California bay.
Ground cover is dense with a wide range of species.
The campground development is located in an area that was logged in the 1920's. Vegetation is predominately red alder which will eventually give way to fir and second-growth redwood. Wildlife is present in all areas. Salmon and steelhead spawn in Mill Creek. Bobcat, coyote, bear, deer, squirrels and chipmunks are most frequently seen.