Mountain · 1 route

Foss Mountain

9,187 ft · Idaho

Summit
9,187 ft
Routes
1 way up

Route up Foss Mountain

  1. FOSS MOUNTAIN TRAILHardabout 2,773 ft of climbing4.7 mi round tripSee the route
Map of the route up Foss Mountain, with each route's start numbered and the summit marked
FOSS MOUNTAIN TRAILMap © Mapbox © OpenStreetMap contributors

About Foss Mountain

Foss Mountain is a summit of 9,187 feet in the Lost River Ranger District of Idaho's Salmon-Challis National Forest, about 5 miles from the town of Clyde. The closest trail is the Foss Mountain Trail, under a mile away, and the Birch Basin Trail is about 1.2 miles off. Cedar Run Trail lies roughly 2.5 miles away, and the Lemhi Range climbing area is about 6 miles away.

Forecast on Foss Mountain

Daily highs and lows, wind and the chance of precipitation at the summit and route start for the next 7 days, from the Open-Meteo model.

Questions about Foss Mountain

How tall is Foss Mountain?

9,187 ft (2,800 m).

How many routes go to the summit of Foss Mountain?

One: FOSS MOUNTAIN TRAIL.

Mountains nearby

More mountains in Idaho

Facts about this place

Where it is

Nearest town
Clyde, Idaho · 5.2 mi

Source: USFS EDW boundaries; USGS GNIS populated places

Conditions

Active alerts for Salmon-Challis National Forest as of Oct 9, 2026:

Source: USFS forest alerts

Nearby

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

Is Foss Mountain open right now?

Alert in the area

The Forest Service lists an alert for Salmon-Challis National Forest.

As of · Source: USFS · Salmon-Challis National Forest. Agencies don't list every closure — check before you go.