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The Flatirons Colorado

The Flatirons, a collection of tilted sandstone slabs, faces, and pinnacles, form Boulder’s distinctive mountain skyline. The conspicuous cliffs, pasted on a 6-mile escarpment formed by Green Mountain… 
  • Address: Boulder, Colorado
  • Season: Expect the best climbing weather in spring and autumn with warm and sunny days. Spring afternoons can be windy. Summer offers excellent weather, although it can get hot and sticky on the slabs. Severe thunderstorms build up on summer afternoons. Plan your climbs for the morning to avoid lightning. W
  • Activity: Climbing
Data from: Trails