BTO—short for Bridges Take Out—is widely considered the best surf feature in the Cache la Poudre Canyon, sitting at the bottom of the run below Pineview Falls in Larimer County, Colorado. The upstream run itself is rated Class III, so expect real current and demand solid boat control to lock in and hold the wave. Like everything on the Poudre, it's a snowmelt-driven spring feature—flows swing fast, so check the gauge before driving up the canyon. It's more of a local Fort Collins paddler's wave than a tourist stop, so come with whitewater experience and a self-rescue plan.