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Koosah Mountain and Sisters Mirror Lake route map
Difficulty: ExpertLoop

Koosah Mountain and Sisters Mirror Lake

Bend, Oregon

12.5 mi

Distance

1,896 ft

Elev. Gain

4h 57m

Est. Time

Loop

Route Type

Expert

Difficulty

About This Trail

Koosah Mountain and Sisters Mirror Lake is a loop trail in Deschutes County, Oregon. It is 13 miles long and gains 1,896 feet. The nearest town is Sunriver, Oregon, about 18 miles away in a straight line.

From the trail data on this page.

Trail Conditions

Trail Conditions

Unknown

We have no current condition data for this trail. Check with the operator before you go, and submit a report below if you've been recently.

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Elevation Profile

Min:1,515 ft
Max:1,971 ft
Gain:578 ft
Loss:578 ft
Elevation profileA line rising and falling between 1,515 ft and 1,971 ft across 12.5 mi along the route, drawn from start to end.1,515 ft1,667 ft1,819 ft1,971 ft0.0 mi3.1 mi6.2 mi9.3 mi12.5 mi

Elevation at the labelled points along this route
PointDistance from startElevation
Start0.0 mi1,524 ft
High point4.9 mi1,971 ft
End12.5 mi1,524 ft

Trail Details

Route Type
Loop

Official sources & verification

Verify before you go

Where it is

Nearest town:
Sunriver, OR · about 18 mi away
County:
Deschutes County, OR

Nearest town and county from U.S. Census Bureau place records and county boundaries.

We display cached information from agency feeds. Hours, fees, permits, closures, fire restrictions, and conditions change without notice. Outdoors is not the permitting authority. Confirm current conditions for this trail using the links above before you go — you are responsible for compliance. Last verified by us: May 23, 2026. Our copy is more than a month old — please reconfirm with the agency before relying on it.Spot an error in our data?

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Legacy import — verify before navigating

Path geometry came from our pre-launch legacy database. Routes have not yet been re-verified against the operator and may differ from the actual trail.

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