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Summit

Sister Peak

Colorado

About

Sister Peak is a summit of 10,358 feet in the Ouray Ranger District of the Grand Mesa, Uncompahgre and Gunnison National Forests, about 0.8 miles from the town of Ouray, Colorado. Summer is the most comfortable time to visit. Typical averages from a nearby weather station in Silverton show July highs around 75°F with lows near 38°F. That station sits roughly 1,000 feet lower than the summit, so temperatures on top run cooler. Winters are cold, with January highs averaging about 34°F. Twin Peaks and the Old Twin Peaks Trail both lie about 0.3 miles away. Climbers can find the Ouray (Ice/Mixed) area about 0.8 miles off, and Four J Campground sits at a similar distance.

Summit Facts

Summit elevation

10,358 ft

Elevation from USGS 3D Elevation Program terrain data (about 10 m resolution).

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Location

Sister Peak

Colorado

Name and location: U.S. Geological Survey, Geographic Names Information System (GNIS). Elevation: USGS 3D Elevation Program. View the GNIS record.

Facts about this place

When to go

Best time to go: Jun–Sep. The mildest months here, with typical highs of 66–75°F and lows of 30–38°F.

Typical monthly averages (not a forecast) from the Silverton, CO weather station, 15 mi away. High / low in °F.

  1. Jan34° high-6° low
  2. Feb36° high-3° low
  3. Mar43° high6° low
  4. Apr48° high17° low
  5. May58° high25° low
  6. Jun70° high31° low
  7. Jul75° high38° low
  8. Aug72° high37° low
  9. Sep66° high30° low
  10. Oct55° high20° low
  11. Nov43° high7° low
  12. Dec34° high-5° low

The station sits about 1,100 ft lower than this spot, so expect it to run cooler up here.

Source: NOAA NCEI U.S. Climate Normals 1991–2020

Where it is

Nearest town
Ouray, Colorado · 0.8 mi

Source: USFS EDW boundaries; USGS GNIS populated places

Conditions

Active alerts for Grand Mesa, Uncompahgre and Gunnison National Forests as of Oct 9, 2026:

Source: USFS forest alerts

Nearby

Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)

    Sister Peak — Summit in Colorado | Roamze