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Mosquito Range · Colorado 13er

East Ridge

Kuss Peak, 13,560'

DifficultyClass 2
Round trip4.5 mi
Elevation gain2,000'
TrailheadMosquito Creek
Trailhead elevation11,560'

Conditions on the summit

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Afternoon storm risk is the line that matters. Everything else is comfort. In summer, plan to be off the ridge before the build-up starts, not as it starts. Forecast for the summit point, adjusted for its elevation · data from Open-Meteo.

Colorado 13er · East Ridge

Overview

Kuss Peak sits just north of the London Mountain saddle on the Mosquito Pass road. This route walks the pass road past the North London Mine to the saddle, then leaves the road and climbs Kuss's east ridge.

It is Class 2 with no trail on the ridge. The steepest part is between 12,900 and 13,200 feet; after that it eases.

The round trip is about 4.5 miles with 2,000 feet of gain, usually 3 to 4 hours. Many people keep going north along the ridge to Mosquito Peak and Treasurevault Mountain.

Plan of the day

Start by

By 6:30 a.m.

Turnaround

Be on the ridge by 10:30 a.m.

Crux

The steep stretch of ridge between 12,900 and 13,200 feet.

Route-finding

Road to the saddle, then straight up the ridge.

Water

None above the creek. Carry it.

Getting to the trailhead

Trailhead

Mosquito Creek

Find it on a map

From Highway 9, about a mile south of Alma, turn west on Mosquito Gulch Road (County Road 12). Drive about 6.8 miles to where the road bends left and crosses Mosquito Creek, then starts climbing toward Mosquito Pass.

Park in the area about 0.1 mile past the creek crossing. Any car can get this far in dry weather. Above here the road to the pass is rough, rocky 4WD.

Before you go

Check these the week of your climb.

Official forecast

The National Weather Service forecast for the summit area, hour by hour. Look for thunderstorm chances and wind above treeline.

NWS point forecast →

Directions to the trailhead

Mosquito Creek. Road conditions near the trailhead change after storms. Check your clearance and have a backup plan for a lower lot.

Get directions →

Roads and highways

Closures, construction and winter conditions on the highways that get you there.

COtrip road conditions →

Closures and fire rules

Trail closures, fire bans and other alerts from the Forest Service in Colorado. For the latest on your trailhead, call the local ranger district.

Forest Service alerts →

Snow on the route?

From fall through early summer, any snow slope can slide. Check the avalanche forecast before you go.

Avalanche forecast →

Cell signal

Most trailheads and many summits have little or no signal. Check coverage near the trailhead and carry a satellite messenger or beacon if you can.

FCC coverage map →

Less traffic, less margin

This describes the route on a dry summer day. Most 13ers see few people, so there may be no one along behind you. Check recent conditions the week you go, carry a map, tell someone your plan, and turn around when the day tells you to.