Mt. Tamalpais is a treasure trove of pristine trails. Weve put together the best singletrack the mountain has to offer for some of the most beautiful mileage youll ever run. At least we think so. Sign up, and see if you agree! Limited to 300 entrants. Pre-registration is highly recommended. This event will sell out! Waiting at the Stinson Beach start line will be the only time you spend at sea level during this trail run. From the word Go youll be heading, up, up and away into the thick wooded trails of Muir Woods. Youll follow the legendary Dipsea trail to Steep Ravine, where youll climb a wooden ladder, march up natural rock and wooden staircases and scramble under tree trunks. Along the way, enjoy the sounds of babbling brooks and waterfalls and drink in the fresh smell of the towering redwoods and oaks that surround you. Your summit will be rewarded with panoramic vistas as you begin your descent back into Stinson Beach. There will be no exhibiting at this marathon.