- Waterproof - Tear-Resistant - Fishing & River Map The Blue River Fishing & River Map Guide is designed to be the perfect companion for anyone recreating on this scenic river. Beginning as a small trickle from its perch on the Continental Divide at Hoosier Pass, the Blue River descends approximately 65 miles to reach its confluence with the Colorado River near Kremmling. With a vertical drop of over 4,000 feet, the river winds through varied landscapes and passes through the towns of Blue River, Breckenridge, Dillon, and Silverthorne. It supports a variety of ecosystems as it matures into a medium-sized waterway known for its prolific insect life, large steelhead, and the wild and scenic landscape—punctuated by snow-capped peaks, rugged canyons, and pine-lined banks—through which it flows. Offering numerous recreational opportunities—including kayaking, whitewater rafting, canoeing, stand-up paddleboarding, and fishing—this life-supporting waterway and its tributaries offer a wide variety of opportunities.