An old ranch road winds its way along Mills Creek for about one mile up to a 1930s bungalow that serves as a park residence. At this point the trail veers off the road and bends down to cross the creek, allowing the visitor to look back in time while viewing the Mills Barn and surrounding outbuildings.
Continuing on the road beyond the barn, the valley narrows between steep, chaparral-covered hills. The walking is good for an additional half mile above the barn past wooden tanks, which supply water for the park residence, before the trail fades away into the dense growth of stinging nettles, poison oak, and coyote brush.
Hiking, bicycling, and horseback riding are allowed on trails and roads.
Visitors to the park should be aware that there is a shooting range near the park residence, reserved for use by state ranger, police, and sheriff personnel.