RoutesPlaces to seeNatural MonumentsNorth AmericaUnited StatesOregonLane County
Willamette National Forest
RoutesPlaces to seeNatural MonumentsNorth AmericaUnited StatesOregonLane County
Willamette National Forest
The Top 20 Natural Monuments in Willamette National Forest
Willamette National Forest’s landscape is a beautiful place to explore — something that you can best experience by visiting one of our 20
beautiful natural monuments in Willamette National Forest. To help you find the one for, you can see all the details you need to explore the best natural monuments, and better plan your next outdoor adventure!
beautiful natural monuments in Willamette National Forest. To help you find the one for, you can see all the details you need to explore the best natural monuments, and better plan your next outdoor adventure!
Last updated: November 26, 2025
Tamolitch Blue Pool
Highlight • Lake
Tamolitch Falls, whose name is inspired by the Chinook jargon word for "bucket", also known as Blue Pool, boasts enduring allure. A lava flow from Belknap Crater buried a 3-mile …
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Three Sisters Wilderness
Highlight • Natural Monument
The Three Sisters Wilderness is part of the Cascade Range and offers geological features such as lava fields, ancient volcanoes (like the Three Sisters itself), alpine meadows, waterfalls and glaciers …
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Obsidian Falls
Highlight • Waterfall
A small, but surprising waterfall within the Three Sisters Wilderness. A short, steep side trail will get you closer to the falls. It got its name from the nearby Obsidian …
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Obsidian Limited Entry Area
Highlight • Natural Monument
You are entering the Obsidian Area next to the Three Sisters. Obsidian is a black glassy rock that is formed when lava is cooling down very quickly. To enter the …
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Collier Cone
Highlight • Volcano
Hike along the towering Collier Cone and be amazed about this volcanic paradise. There might be snow even in late summer.
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