15 Nov 2015 Hikes > 5 miles, marin county, moderate, north bay, waterfront Mount Tamalpais Steep Ravine 3801 Panoramic Hwy, Mill Valley, CA 94941 // Steep Ravine Trail 6.5 miles // 3 hours // mostly exposed Moderate with some lengthy steep inclines. We did about half of this trail in under 2 hours. Great hike today. So much beauty. We found cool teepees on the beach. Ahhhhhh. Leo touches the magic ocean. Gazing out onto the Pacific.