| Petit Grepon | |
| Elevation Ft: | 12305 |
| Elevation Ref: | [1] [2] |
| Prominence Ft: | 300. |
| Isolation Mi: | 0.04 |
| Location: | Rocky Mountain National Park, Larimer County, Colorado, U.S. |
| Range: | Front Range |
| Map: | Colorado |
| Coordinates: | 40.281°N -105.6738°W |
| Topo: | USGS 7.5' topographic map McHenrys Peak, Colorado |
| First Ascent: | Bill Buckingham & Art Davidson, 1961. |
Petit Grepon is a semi-detached spire in Colorado's Rocky Mountain National Park. It is one of the "Cathedral Spires" which also includes: Sharkstooth, The Saber, and The Foil. The South Face route of Petit Grepon is described in the historic climbing text Fifty Classic Climbs of North America and considered a classic around the world.[3]
According to the Köppen climate classification system, the spire is located in an alpine subarctic climate zone with cold, snowy winters, and cool to warm summers.[4] Due to its altitude, it receives precipitation all year, as snow in winter, and as thunderstorms in summer, with a dry period in late spring.