Hidden Valley is a hiking trail in Marin County, California. It is within Point Reyes National Seashore and Phillip Burton Wilderness Area. It is 0.5 miles long and begins at 151 feet altitude. Traveling the entire trail is 0.1 miles with a total elevation gain of 41 feet. The Clem Miller Environmental Education Center (elevation 154 feet) school is near the trailhead.
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