Velo Tamalpais Professional Review and Guide
"Velo Tamalpais could win the title for “most scenic ride,” despite the significant competition from nearly every offering in this book. With its doses of ocean views, mountain climbs, redwood groves, and stunning vistas, the scenery along this route is hard to surpass—not just here in the Bay Area, but anywhere in the United States.
This is a challenging lollipop-shaped route in central and western Marin County, with an optional extension to the top of Mount Tamalpais. While advanced cyclists might tear through this ride, novice riders—and even advanced ones—might want to slow down and savor the surroundings. To avoid the congestion (and confusing circulation patterns) in the closest city, Mill Valley, the ride starts outside the city at the Dias Ridge trailhead (elevation, 655 feet) along the Panoramic Highway, near the junction with SR 1."