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Greyrock Summit via Seaman Reservoir route map
Difficulty: DifficultOut and Back

Greyrock Summit via Seaman Reservoir

Bellvue, Colorado

11.6 mi

Distance

2,844 ft

Elev. Gain

5h 17m

Est. Time

Out & Back

Route Type

Difficult

Difficulty

About This Trail

Greyrock Summit via Seaman Reservoir is an out-and-back trail in Roosevelt National Forest, managed by the United States Forest Service, in Larimer County, Colorado. It is 12 miles long and gains 2,844 feet. The nearest town is Laporte, Colorado, about 5 miles away in a straight line.

From the trail data on this page. For conditions and closures, see official sources.

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:1,641 ft
Max:2,301 ft
Gain:998 ft
Loss:998 ft
Elevation profileA line rising and falling between 1,641 ft and 2,301 ft across 11.6 mi along the route, drawn from start to end.1,641 ft1,861 ft2,081 ft2,301 ft0.0 mi2.9 mi5.8 mi8.7 mi11.6 mi

Elevation at the labelled points along this route
PointDistance from startElevation
Start0.0 mi1,651 ft
High point5.9 mi2,301 ft
End11.6 mi1,651 ft

Trail Details

Route Type
Out & Back

Official sources & verification

Managed by United States Forest Service

Verify before you go

Managing agency

Where it is

Nearest town:
Laporte, CO · about 5 mi away
County:
Larimer County, CO
Jurisdiction:
Roosevelt National Forest · United States Forest Service

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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