The Top 20 Natural Monuments in Boulder County
Boulder County’s landscape is a beautiful place to explore — something that you can best experience by visiting one of our 20
beautiful natural monuments in Boulder County. 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 Boulder County. 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 13, 2025
Royal Arch
Highlight • Natural Monument
This natural stone arch will rewards you with great views of Boulder and the Flatirons.
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Mount Sanitas
Highlight • Summit
One of the most famous hiking trails in downtown Boulder is known for its challenging terrain and easy accessibility, making it a popular choice amongst hikers in the region. To …
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Green Mountain Peak
Highlight • Summit
Summer and winter alike, this peak is always accessible and provides very beautiful views especially on the nearby Indian peaks.
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First and Second Flatirons Trail
Highlight (Segment) • Trail
This is not a trail for those who like smooth, flat walking trails. This section of trail requires some rock scrambling, and there are a couple sections that can be …
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South Boulder Peak
Highlight • Summit
The view of South Boulder Peak, despite the trees burned by recent forest fires is just exceptional. The mountain range is on one side and the Eldorado Canyon on the other. A real wonder.
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Red Rocks Trail Rock Formations
Highlight • Natural Monument
There are a lot of different views on the Red Rocks trails. The red sandstone rock formations in the area are what give this system the name Red Rocks Trail.
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Amphitheater Rock
Highlight • Climb
Amphitheater Rock Trail climbs into a dense, green area. This is a popular area for climbers so there are lots of spur trails at the top leading to different routes.
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Brainard Lake
Highlight • Lake
Brainard Lake Recreation Area is set in a glacially carved valley offering visitors spectacular panoramic views of Brainard Lake, surrounding subalpine forest, and high peaks along the Continental Divide. Because of the area's high elevation, snow typically remains until July.
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Chasm Lake
Highlight • Lake
This lake is one of the most remarkable in the Rocky Mountains. Its austerity contributes to the beauty of the place.
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Anemone Point Viewpoint
Highlight • Viewpoint
Anemone Point offers stunning views of downtown Boulder and Mount Sanitas, with a panoramic 360° lookout. The point is at an elevation of 6,310 feet. It's a popular spot, often …
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View of Flatirons
Highlight • Viewpoint
This spot on the trail offers a great viewpoint of the Flatirons. The Flatiron climbing trails can be easily accessed by Chautauqua Park, but these scrambling routes take more planning to tackle than a standard hike.
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Find even more amazing natural monuments in Boulder County by checking out the top Highlights region by region:
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Extend your search for the best caves by checking out these guides of the top ones in Boulder County:
Front RangeLarimer CountyEl Paso CountyJefferson CountyPike And San Isabel National ForestsArapaho And Roosevelt National ForestsWhite River National ForestMesa CountySan Juan MountainsClear Creek CountySan Juan National ForestMontezuma CountySawatch RangeGarfield CountySan Juan CountySummit CountyDouglas CountyFlat TopsGrand Mesa, Uncompahgre And Gunnison National ForestsGrand CountyMontrose CountyPark CountyPitkin CountyChaffee CountyLa Plata CountyLake CountyRio Grande National ForestEagle CountyTeller CountyAlamosa CountyHinsdale CountyRoutt CountySaguache CountyGunnison CountyBroomfieldGilpin CountyMedicine Bow Mountains
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