Park & nature

The Flatirons

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The Flatirons are a series of dramatic, tilted sandstone slabs that rise sharply from the eastern edge of the Rocky Mountains, forming an unmistakable backdrop to Boulder. These formations, shaped by erosion over millions of years, are a beloved symbol of the city. Visitors can explore a network of trails ranging from easy walks to strenuous climbs, with the popular First and Second Flatiron routes attracting hikers and climbers alike. The area is also a prime spot for sunrise and sunset photography, when the rocks glow with warm hues. Whether you're scaling the slabs or simply admiring them from a distance, the Flatirons offer a quintessential Boulder experience.

Don't miss

  • Hike the Royal Arch Trail for a close-up view of the Flatirons and a natural stone arch.
  • Photograph the formations at sunrise or sunset for dramatic lighting and color.
  • Watch rock climbers ascend the sheer faces of the First and Second Flatirons.

Tickets & tours

Ways to visit The Flatirons

You can usually visit on your own. A tour is worth it for transport, a guide, or combining nearby sights into one day.

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