Big Obsidian Flow

Photograph taken by on Sunday, September 22, 2024
Big Obsidian Flow

Big Obsidian Flow

Big Obsidian Flow

Big Obsidian Flow

We visited the Big Obsidian Flow today. It is in the Newberry National Volcanic Monument in the Deschutes National Forest of central Oregon and about 25 miles south of Bend. This, in my opinion, is a must-visit site. My pictures really don’t do the site justice. In fact, the trail up into the flow doesn’t do the site justice, although it’s definitely worth the walk. It’s about seven tenths of a mile, with part of that being a loop up on the flow but you only really get less than 300 yards into the flow, which is close to a mile and a half long. If we return to the area, I’d love to plan a full day hike around the flow, which should be doable.

The Big Obsidian Flow was formed in the volcano’s most recent eruption, about 1,300 years ago. It’s amazing that there are actually trees growing in the flow, although not many. It’s a pretty brutal landscape. Obsidian is a naturally occurring volcanic glass formed when lava from a volcano cools rapidly with minimal crystal growth. Not all of the flow is obsidian, but there are large boulders, some broken into smaller pieces, others still mostly intact. It’s quite remarkable and eerily beautiful.

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