Deer Park Trailhead is a very accessible start to a wide variety of hiking and off-road biking trails and fire roads in the Fairfax-San Anselmo region of the Marin Municipal Water District Mt. Tamalpais Watershed lands. Just drive to the very end of Porteous Avenue in Fairfax, and park in the free lot. There you’ll also find a number of picnic tables and the start of the trailhead, which is not marked but is easy to see on the left side near the preschool.
This is a really popular trail, and a lot of bike riders use it, so watch for some pretty fast trail traffic (those two blurs in the photo are bikers!). It’s a fun outing for kids, too, because it’s not that steep and there are some shorter loops you can do. Not all of the trails that branch out from Deer Park Trail are open to bicycles – watch for the signs.
Dogs are welcome on the trails so be sure to bring doggie bags – I didn’t see any dispensers at the trailhead.
Where: Deer Park, End of Porteous Avenue, Fairfax, CA 94930 (map)
Hours: Open Sunrise to Sunset, year ’round