Main MenuThe Gunnison River is one of the major tributaries of the Colorado River – the principal water supply for many in the southwestern US. Entirely located in the state of Colorado, the Gunnison flows from its distributed headwaters, primarily above the City of Gunnison, to meet the Colorado River in Grand Junction. After this confluence, the volume of the Colorado River is almost doubled in volume by the Gunnison River (on average the Colorado River receives approximately 40 per cent of its flow or 1.7 million acre-feet of its flows as measured by the USGS gage at the Colorado-Utah stateline.)
The Colorado River flows west where it meets the Green River in Utah, and then flow south and west through the Grand Canyon region, then south between Arizona and California to Mexico
