Old Mine Trail is a hiking trail in Marin County, California. It is within Mount Tamalpais State Park. It is 0.5 miles long and begins at 1,469 feet altitude. Traveling the entire trail is 1.1 miles with a total elevation gain of 293 feet. Near the trailhead there are restrooms, a picnic site, and parking. The Pantoll camp site can be seen along the trail. The trail ends near the Water Fountain drinking water and Cardiac Hill (elevation 1,355 feet).
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