64 mi, 5 LM, 6305 ft; Milagra Ridge,Golden Gate N.R. Area,Marin Headlands Trails,Palmetto Skyline,Conzelman,San Bruno Mountain,Sharp Park

Best for non-suspension hybrid bikes. Explore strenuous scenery. Bike-hike narrow, steep single track. Shop, drop, wade and walk. Start from the Environmental Sciences Bldg. 12 overlook at the bench/west windows of the Farallon Room (park nearby within Skyline College) to: unpaved single track Milagra Ridge, Pacifica Esplanade, Palmetto variant, Lake Merced, Ocean Beach, Lands' End, Baker Beach, Golden Gate, Conzelman, Hawk Hill, Bicentennial Camp, Rodeo Beach, Battery Townsley* Loop, unpaved Miwok Trail, Alta Fire Road (steep descent), Marin City with resupply options: groceries, Panda Express and Starbucks, Sausalito (ferry transit option), Fort Baker-Presidio Yacht Club, Golden Gate, Sports Basement Fort Mason, Conservatory of Flowers, Glen Park, San Bruno Mtn. variant, Pacifica, Sharp Park to finish.

*San Francisco's most extensive and secret World War II fortification. Start location: 3300 College Dr #12, San Bruno, CA 94066 [Route/Map]