Alpine Road Trail is a hiking trail in Portola Valley, California. It is within Coal Mine Ridge Park and Windy Hill Open Space Preserve (closed area). It is two miles long and begins at 681 feet altitude. Traveling the entire trail is 4.0 miles with a total elevation gain of 477 feet. The Coal Mine Ridge Trails information map is near the trailhead. There are also information guideposts and parking. Along the trail there are drinking waters.
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