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Mosquito Range · Colorado 13er

From Mount Sherman

Gemini Peak, 13,961'

DifficultyClass 2
Round trip6.6 mi
Elevation gain2,500'
TrailheadFourmile Creek (upper gate)
Trailhead elevation12,000'

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 · From Mount Sherman

Overview

Gemini Peak is an unranked summit with two summit bumps on the ridge running north from Mount Sherman toward Dyer Mountain. The usual way to it is to climb Sherman by its standard route from Fourmile Creek, then walk the ridge north.

Sherman's route is an easy trail. The ridge to Gemini is Class 2, open and gentle, with a drop and regain between the peaks.

The round trip is about 6.6 miles with 2,500 feet of gain, usually 5 to 6 hours. Many people continue on to Dyer Mountain.

Plan of the day

Start by

By 5:30 a.m. Sherman is busy and exposed.

Turnaround

Be on Sherman's summit by 10:30 a.m. or skip Gemini.

Crux

Nothing hard. Weather on the long open ridge is the main concern.

Route-finding

Follow the Sherman trail to its summit, then the ridge north.

Water

None. Carry it.

Getting to the trailhead

Trailhead

Fourmile Creek (upper gate)

Find it on a map

From Fairplay, head south on US 285 for a little more than a mile, then turn right on County Road 18. Follow it about 10 miles past the old Leavick site, then about 2 more miles to a gate and small parking area at about 12,000 feet.

Most higher-clearance cars reach the gate; if the lot is full, park lower and walk.

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

Fourmile Creek (upper gate). 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.