At just 1,300 years old, the Big Obsidian Flow is the youngest lava flow in Oregon. It covers about one square mile near the Newberry caldera – formed when the volcano's cone collapsed about ...

With its iconic mountains, rivers, and coastline, it’s easy to overlook the adventure of discovering some of Oregon’s underground wonders.

A large lava tube—a cave formed from a volcanic eruption—was discovered beneath a home in Bend in central Oregon.. Back in 2017, realtors told Suzanne and James Brierley that there was a small ...

The longest lava tube in Oregon, the Lava River Cave, stretches for about a mile through the Newberry National Volcanic Monument south of Bend. It was formed about 65,000 years ago. Taking a jaunt ...

For lava flows, singletrack and mountain views, try Black Rock Trail. Published 2:37 pm Thursday, April 10, 2025 ...

The High Lava Plains - a ~10 million year old chain of rhyolite and basalt volcanism that gets younger to the west -- intersect the Cascade Range near Bend, Oregon. The Basin & Range -- the province ...

Two hours west of Portland on the outskirts of the Mount Hood National Forest, a 7,700-year-old mound of lava rocks rises 164 feet above the Hood River wine country. Stretching more than 4 miles ...

Popular geologist Nick Zentner of “Nick on the Rocks” takes an entertaining road trip to explore the Ginkgo lava flow that erupted in Central Washington and flowed all the way to the Oregon ...