Big River Bike/hike/horse Trail features 10 miles of hiking trails near Mendocino/fort Bragg, CA.
From 101 in Willits take HWY20 west to Fort Bragg. Turn left at the HWY20 HWY1 junction untill you reach mendocino. Once you pass the main street exit, the turnoff is on your right (you've missed it if you've goen over the bridge).
http://www.tripleblaze.com/trail.php?c=3&i=63