Beaver Wave is a man-made feature on the South Platte River right in Denver, part of the city's broader downtown whitewater corridor. It's rated a beginner wave and works at low flows, making it a solid pick for people still building confidence rather than chasing the biggest push. It's surfable pretty much year-round, weather permitting, which is unusual for a river wave and part of what makes it useful for locals getting reps in. Like most of Denver's river features, don't expect solitude—its downtown location means it gets used hard by the local crew.