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- Mount Lago
8,746 ft · Cascade Range, Washington
Mount Lago
Mount Lago is an 8,746 ft peak in the Cascade Range, Washington. The standard route is the Southwest Face: 32 mi, 8,100 ft of gain, Class 3.
Photo: Eggbones, CC BY-SA 4.0
Mount Lago at a glance
- Elevation8,746 ft2,665 m
- RouteSouthwest FaceClass 3
- Distance32 mi8,100 ft gain
- Time2 – 3 daysVery Hard effort
- SeasonJul – Sep
- RangeCascade RangeWashington
Climbing the Southwest Face
From Mazama, take Lost River Road and narrow Harts Pass Road (FR 5400, no trailers) past Harts Pass to the Slate Pass trailhead. Descend to the Middle Fork Pasayten trail, follow it about 9 miles to the Berk Creek junction, then climb past Freds Lake over Rolo Pass and drop toward the Eureka Creek crossing. A red talus gully leads north toward the Lago-Carru saddle, then the southwest face gives Class 2-3 scrambling on crumbly rock. The valley burned in 2026, so check trail status first. Fill out the free wilderness permit at the trailhead. Circuit option: Lago, Carru and Osceola, 37 mi / 10,500 ft.
Gear and hazards
What to bring
Backpack (55–75 L)
Hiking Boots
Water
Offline Maps
Headlamp
Satellite Communicator
Whistle
Sunglasses
Sunscreen
Sun Hat
Midlayer
Insulated Jacket
Hardshell Jacket
Warm Hat
Buff
Midweight Gloves
Trekking Poles
GPS Device
Power Bank
Water Filter
First-Aid Kit
Emergency Bivy
Helmet
What to watch for
- Loose rock
- Route-finding difficulty
- Remote location
- Spotty cell reception
Quests with Mount Lago
Washington 100 HighestFrequently asked questions
How tall is Mount Lago?
Mount Lago is 8,746 feet (2,665 m) tall. It is in the Cascade Range, Washington.
How hard is it to climb Mount Lago?
The Southwest Face is Class 3, which means scrambling, where you use your hands to climb and a fall could be serious. Yak rates the overall effort very hard: 32 miles with 8,100 feet of elevation gain.
How many days does it take to climb Mount Lago?
Most climbers plan 2 – 3 days for the Southwest Face, with at least one night on the mountain.
Is Mount Lago dangerous to climb?
It has real risks: rockfall from loose rock and tricky route-finding. Go with an experienced partner, wear a helmet, test holds before you trust them and turn back if the rock is wet or icy.
Do you need a helmet for Mount Lago?
It is a good idea. Loose rock and rockfall are common on the Southwest Face, so a helmet is on the gear list.
When is the best time to climb Mount Lago?
The usual climbing window is July to September. Outside it, expect snow, storms or closed access, and check the summit forecast before you go.
Climb Mount Lago with Yak
Plan your route on a topo map, check the summit forecast, then log your climb and see what is left on your list