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Big Obsidian Flow
Credit: Dean Wampler
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About Big Obsidian Flow Trailhead and Interpretive Site
At 1,300 years old, the Big Obsidian Flow is the youngest lava flow in Oregon. A simple one-mile interpretive trail climbs up and onto this lava flow of obsidian (black glass) and pumice. The Newberry Crater Trail also passes through this site, which connects to the Lost Lake Trail.