The Dipsea Trail is a breathtaking hike (in more than one way) running from Mill Valley to Stinson Beach. Every June, 1500 brave souls enter the Dipsea Race, the oldest trail race in America. I have a deep respect for the people that run this because it took it all out of me to hike this 8 mile course at a leisurely pace with plenty of breaks. The views are unbeatable, even on a foggy day. If the scenery isn't enough to drive you, think instead about the delicious milkshakes awaiting you in downtown Stinson Beach at the Parkside Snack Bar. If you don't want to haul yourself back over the mountain for the 4 hour hike back, take the West Marin Stage bus from Stinson to Mill Valley instead.