"This 11.2-mile out-and-back (5.6 miles each way) is so easy to follow that you really don’t need a map. Just stay on the easy, wide, well-traveled, nontechnical, smooth fire road, and keep grinding up, bypassing the few foot trails (off-limits to bikes) leading away from the road. Signposts along the way measure your progress, or at least remind you of the push you must sustain. Fortunately, the pain is eased by about six switchbacks and the emerging views of the Napa Valley. A high peak of volcanic origin, this nearly mile-high mountain boasts an incredible panoramic view in all directions. On a clear day, you can see San Francisco, the ocean, the snowcapped Sierra Nevadas, Mt. Diablo, and even Mt. Shasta to the north. You’re certainly never too far from civilization as you gaze down into the wine country with its sprawling vineyard estates. The only abundant shade on this route is during the first mile. After that, only small spots of shade offer some respite on warm, sunny days."