Brennan's Wave sits smack in downtown Missoula on the Clark Fork, built in 2006 by converting an old irrigation diversion that used to snag debris with exposed rebar and concrete. It's named for Missoula paddler Brennan Guth, who died on Chile's Rio Palguin in 2001—his father's memorial fund helped get the project built. The structure splits the river into channels, with two forming surfable waves that work for everyone from first-timers to the freestyle kayakers who packed the 2010 U.S. Freestyle Championships here. It sits right next to Caras Park, so sessions often happen around Thursday night concerts and the Saturday farmers market.