North Fork Big Thompson River

CO • US

The North Fork Big Thompson River is a 22.7-mile-long (36.5 km) tributary of the Big Thompson River in Larimer County, Colorado. The river's source is Rowe Glacier on the north slope of Hagues Peak, in the Mummy Range of Rocky Mountain National Park. It flows through Lake Dunraven, over Lost Falls and through Glen Haven before a confluence with the Big Thompson in Drake.

14.1 mi total 1 sections 2 access points 0 camps 0 rapids

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Click any point for details. Sections without stored geometry are drawn as straight put-in → take-out lines — actual courses follow the river.

Sections (1)

North Fork Big Thompson River upstream end (OSM) to North Fork Big Thompson River downstream end (OSM)

● North Fork Big Thompson River upstream end (OSM) → ● North Fork Big Thompson River downstream end (OSM)