Saturday, April 21, 2018. The Bay Area’s most gorgeous hike and ride through Marin and across the Golden Gate. Hikers, runners, mountain bikers, and equestrians all join the fun with moderate to challenging options. Shuttles from the Presidio to trailheads allow for gorgeous one-way trips. Everyone enjoys tasty snacks and drinks at staffed rest stops and a catered trail-side lunch. 2018 registration is open now!