Union Chutes is a South Platte River spot right off Union Ave and Santa Fe, on the Englewood/Littleton edge of Denver, with an easy parking-lot-to-water walk-in. Its main feature, the U2 wave, is a quick left-hand wedge that turns into a micro barrel around 1,200-1,500 cfs and a steeper pile above that, sitting just upstream of the Hawaii 5-0 wave. Big eddies on either side help keep you out of the next drop, but there's a hole just below that can hold a surfer down and shoot them twenty yards downstream, so leave the leash at home and swim strong. It's become a reliable local hangout for Denver's river surf crowd, flows permitting.