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. Varied thrush, Stellar's jays, hawks, great blue heron and dippers are common birds. The topography is fairly steep with elevations from sea level to 1277'. The predominant mountain range is oriented in a north-south direction with steep cliffs adjacent to the Pacific Ocean, making the bulk of the rocky sea coast generally inaccessible except by Damnation Trail and Footsteps Rock trail.