Blue River, River tributary in Summit County, Colorado, US
The Blue River is a tributary in Summit County, Colorado, running northwest from Quandary Peak toward the state's western border. It flows through several reservoirs and valleys before joining the Colorado River near Kremmling.
The Roberts Tunnel, built in 1962, carries water from the Blue River under the Continental Divide to the South Platte River Basin. This project brought water from the western to the eastern side of the mountains.
The river shapes daily life in the towns along its course, serving as a center for outdoor recreation and water management. Locals and visitors regularly use it for fishing and paddling activities.
You can reach this river at multiple points along Highway 9, from Kremmling in the north to Green Mountain Reservoir. The best time for fishing and paddling is summer and early fall when water levels are manageable.
The Green Mountain Dam creates a reservoir that generates hydroelectric power while supplying irrigation water to local farms. This dam transformed the river corridor and became one of the region's most important water storage facilities.
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