DirectionsTrail GuideTopo MapReviewsPhotosGPS
Sibley Volcanic Regional Preserve Professional Review and Guide
"What do the Sibley Volcanic Regional Preserve and Mount Saint Helens have in common? The subduction process that caused a volcanic explosion here ten million years ago eventually moved northward to cause the eruption of Washington’s Mount Saint Helens. Hiking among Monterey pines and on open grassy hills, you will see walls of the caldera left by the ancient blast, old river gravels, basalt lava flows, and varicolored “redbeds,” layers of oxidized iron explored worldwide for fossils. More recently, enthusiastic hikers have built a series of rock mazes in the preserve’s old quarries, complete with altars. Trails Surface: Mostly well-packed dirt trail that varies in width but with some loose gravel; finish on a paved path."
--Linda Hamilton, Best Hikes Near San Francisco (Falcon Guides).
Sign in/up to upload photos.