Cat 1

Flagstaff Mountain from Boulder

Colorado, united-states

Flagstaff Mountain from Boulder covers 9.8km and 689m of climbing, reaching 2,390m at the summit. The average gradient of 7% disguises ramps of 15% — the kind of gradient that turns plans into prayers. 10 hairpins punctuate the ascent, offering brief respite in the corners before the gradient bites again. At 2,390m, the summit rises above the treeline into an exposed, often windswept landscape. Located in Colorado, United-states.

  • The crux hits between km 6 and km 7 — 7km above 10% averaging 11.8%.
  • Summit above 2,000m — the road climbs above the treeline into exposed, often windswept terrain.
  • 10 hairpin bends punctuate the climb, each switchback offering a moment to regroup.
  • One of only 2,281 Category 1 climbs in the database.

Flagstaff Mountain from Boulder

Colorado, united-states

9.8km 689m 7%
1

Distance

9.8km

Avg Gradient

7%

Max Gradient

15%

Elevation Gain

689m

Summit

2,390m

Wall Rating

5.1

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