Mount Sneffels Mountain

Colorado fourteener in San Juan Mountains, rugged terrain

Part of Colorado's Sneffels Range, Mount Sneffels is a classic fourteen‑er favored for steep scrambles, sharp ridgelines and sweeping views over the San Juan Mountains.

Main image

Mount Sneffels at a Glance#

Address: Sneffels Range, near Ouray and Telluride, Colorado, USA (approx. 38.0033°N, 107.7923°W)

About Mount Sneffels#

Mount Sneffels is a 14,150-foot (4,315-meter) peak in Colorado’s San Juan Mountains and is a well-known fourteener. It forms the high point of the Sneffels Range and is a popular mountaineering and hiking objective in southwestern Colorado.

The mountain presents classic alpine ridges and steep faces; common approaches include routes that start from nearby alpine basins and require route-finding over talus and rock. Its prominence and shape make it a frequent subject for photographers and climbers.

First ascents and regular climbing activity date from the late 19th and early 20th centuries as the San Juan range was explored and mapped. Recreational use expanded in the 20th century with improved access by road to nearby trailheads.

Located near the towns of Ouray and Ridgway in southwestern Colorado, Mount Sneffels rises above the Uncompahgre and San Miguel valleys and is visible from sections of U.S. Highway 550.

  • Elevation and status: Rises to 14,150 feet and is one of Colorado’s well-known ‘fourteeners’, popular with day-hikers and climbers.
  • Visible from nearby towns: Prominent from Highway 550 and the nearby towns of Ouray and Ridgway, providing striking views from valley roads.

How to Get to Mount Sneffels#

Most parties stage from Ouray or Ridgway. The usual trailhead is in Yankee Boy Basin (about 6 miles south of Ouray on County Road 5), with a steep trail gaining the basin; the standard ascent starts from the Yankee Boy Basin parking area and climbs via established but often loose routes.

Tips for Visiting Mount Sneffels#

  • Start early to avoid afternoon thunderstorms common in Colorado's high country from July through September.
  • The standard route off Yankee Boy Basin involves loose scree-use trekking poles and be ready for steep talus sections.
  • Altitude is real: acclimatize in Ouray or Ridgway before attempting this fourteener.

Best Time to Visit Mount Sneffels#

Best visited in mid-summer for non-technical ascents; afternoon thunderstorms are common and can be dangerous.

Summer
June-September · 0°C to 15°C on summit days
Main hiking/climbing season; snow usually melted on the standard routes though late snow can linger in sheltered gullies.
Winter
December-March · -15°C to -5°C
Serious alpine conditions with deep snow-visited by experienced ski mountaineers and ice climbers.

Weather & Climate near Mount Sneffels#

Climate

Mount Sneffels's climate is classified as Tundra - Tundra climate with cold summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -18°C to 16°C. Moderate rainfall (918 mm/year).

Air Quality: AQI 16 Good
Temperature & Rainfall
Temperature Range
17°
Warmest Month
-18°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January - -17° - -3° -18° 73 mm - - 5.4 m/s - -
February - -18° - -2° -17° 75 mm - - 5.1 m/s - -
March - -17° - -2° -17° 96 mm - - 5.0 m/s - -
April - -14° - 0° -14° 68 mm - - 5.2 m/s - -
May - -8° - 5° -7° 53 mm - - 5.1 m/s - -
June - -3° - 11° 0° 45 mm - - 4.5 m/s - -
July - 2° - 17° 7° 93 mm - - 3.7 m/s - -
August - 2° - 16° 7° 99 mm - - 3.6 m/s - -
September - -1° - 13° 3° 80 mm - - 4.3 m/s - -
October - -5° - 7° -4° 73 mm - - 4.9 m/s - -
November - -12° - 2° -11° 78 mm - - 5.0 m/s - -
December - -16° - -1° -16° 85 mm - - 5.5 m/s - -