Blue River (Colorado)
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The Blue River is a tributary of the Colorado River, approximately 75 mi (121 km) long, in the U.S. state of Colorado.
It rises in southern Summit County, on the western side of the continental divide in the Park Range, near Quandary Peak. It flows north past Blue River and Breckenridge, then through the Dillon Reservoir near Dillon. North of Dillon it flows NNW along the eastern slope of the Gore Range and joins the Colorado at Kremmling.
The Green Mountain Dam, 13 miles upstream from Kremmling, forms the Green Mountain Reservoir, providing hydroelectric power and diversionary water for irrigation, as part of the Colorado-Big Thompson Project.