Start right in downtown San Rafael. The first 2 miles is flat, heading south out of town on pleasant residential streets. Turn RIGHT on San Rafael Ave. to access Gerstle Park, a small, pretty park around a historic estate that’s a popular event spot. Head back down one of the other residential streets, through downtown, using B St. to access Boyd Memorial Park. Run on the paved Robert Dollar Dr. through the park, starting a steady climb, and then LEFT on the gravel Robert Dollar Hiking Trail, a wide, car-free path through Boyd Memorial Park and Mountain park. This is a 550-foot climb over just 1 mile, 9-11% grades — not for the intrepid! After enjoying the views and recovering from the climb, retrace your steps back down the hill.