"A reservoir of the Missouri River, Canyon Ferry Lake is Montana's third-largest lake and, when frozen, an ideal place to skate. At 28 miles long, there's plenty of space to cruise on ice under a winter sky. This is wild ice, which means there are no rinks around renting skates and selling hot chocolate, so you should have a pair of ice skates and some experience in Nordic Skating before setting out." - Travel + Leisure Editors