KEYWORDS: Mount Tamalpais, Marin Municipal Water District, serpentine
It is about 3 miles from the parking lot to Carson Falls and back. In the first part of the trail, the geology alternates between serpentine and non-serpentine, and the plants follow suit. There are great views of the bay on a clear day. The second part of the trail goes steeply down to Carson Falls.
For this hike, from the parking lot, cross the road and head west uphill. You will be on Pine Mountain Fire Road. Follow this road for about a mile, then turn sharply left onto Oat Hill Fire Road. Then take the Liberty Trail down through the trees to Carson Falls. There are trail signs along the way.