Alex Buisse Photography
Flatirons

The Flatirons: Boulder’s Iconic Climbing and Scrambling Destination

Rising just minutes above downtown Boulder, the Flatirons are a legendary playground for hikers, scramblers, and climbers. Known for their moderate routes—many in the 5.0 to 5.5 range—these striking sandstone slabs have long attracted adventurers seeking everything from casual ascents to bold solo climbs. With strict bolting regulations and sometimes challenging protection, the Flatirons have become a proving ground for climbers of all skill levels.

Featuring 120 classic routes across the most famous formations—including the Five Flatirons themselves—this collection highlights the complexity and diversity of this iconic landscape. Whether you’re a seasoned climber or simply looking to explore Boulder’s rich climbing history, the Flatirons offer an unforgettable experience in one of Colorado’s most scenic outdoor destinations.