Calistoga, CA 94515
By far the highest point in the north bay area at 4,339 feet, the summit of Mt. St. Helena offers stunning 360-degree views of the entire Napa Valley and coastal range. A very challenging uphill hike, the trail passes through lovely meadows and groves of oak and laurel. Much of the trail is a wide fire road and can get very hot in summer, so bring plenty of water and sunblock.