Charlie's Hole, officially C-Hole, is the best known of several surfable features built into the Yampa River Whitewater Park that runs right through downtown Steamboat Springs. It's one of a handful of man-made drops along that stretch, part of a whitewater park system locals and visiting kayakers have used for decades. It holds up best during spring runoff and early summer when snowmelt pushes flows up, and goes quieter later in the season. Being right along the Core Trail makes it an easy walk-up session, and a popular one, so expect to share the feature on a good flow day.