The Dipsea Trail is a 7 mile trail (one-way) running from Mill Valley through Muir Woods and Mt Tamalpais State Park all the way to Stinson Beach. It is home to one of the oldest trail races in the country – the Dipsea Race – first run in 1905. With two cars (or a willingness to research bus schedules), the trail can be hiked one way. If transportation options are limited, it’s possible to hike the entire trail out and back for a total of 14 miles and 4400-ft of elevation gain.
For more details, check out the Norcalhiker blog post on this trip.