Gibson Reservoir

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Gibson Reservoir is located just south of the Bob Marshall Wilderness in Montana. The reservoir is formed by a concrete dam and backs water up between a hilly pass for about 3 miles. The water in the dam is initially provided by spring snow runoff and carried there via the North Fork Sun River and the South Fork Sun River right after the two join. The reservoir is mainly used for irrigation control. Recently, due to quite dry summers, the water has been well below average levels (20+ feet), as the water has been needed for crop irrigation. Gibson Reservoir is a common place to either hike in or catch boat rides into the Bob Marshall Wilderness.