Fishing rules on the Blue River change from one stretch to the next

The Blue River is Summit County’s main river. It starts high near Hoosier Pass, flows through Breckenridge and Dillon Reservoir, and continues north toward Green Mountain Reservoir. Anglers love it, but it is not one single rulebook.

Colorado sets fishing rules water by water, and the Blue is a good example. Different stretches can carry different catch limits, gear restrictions, and seasonal closures, and some segments hold quality-water or special designations. The river supports rainbow and brown trout, and in fall kokanee salmon move upstream from Green Mountain Reservoir. Some public access runs through the Blue River State Wildlife Area, where everyone 16 and older needs a fishing or hunting license or a State Wildlife Area pass.

Why this matters: a limit or method that is fine on one stretch may be illegal a mile away. Rules and closure dates also change between years, so last season’s memory is not a safe guide.

Before fishing the Blue River, check Colorado Parks and Wildlife for the current regulations on the exact segment you plan to fish.