I lived in the Breck for years and Upper Blue is fun and awesome if you're local but not so great if you are visiting and can't run everything. Consider Pine Creek and/or Numbers on the Ark, Dowd Chute to Avon on the Eagle, or almost anything on Clear Creek, especially Lawson to Idaho Springs. Any of those should be better worth your time. If you are staying in Breck area, I'd say Ten Mile Creek from Officer's gulch to frisco is best.
Those are all similar but slightly higher in difficulty by the way.
A forum community dedicated to whitewater kayaking, boating, and rafting enthusiasts. Come join the discussion about safety, routes, gear, models, styles, gear swaps, reviews, accessories, classifieds, and more!