Narrowly bounded by high basalt walls and once one of the roughest sections of the Yukon River, Miles Canyon is now the site of a hydroelectric dam and the world's longest wooden fish ladder. The native Chinook salmon that migrate past Whitehorse use the fishway to bypass the dam, on their way to completing one of the longest fish migrations in the world. Mid-July to mid-August, you can view these magnificent fish through windows looking in on the ladder. Interpretive displays and an upper viewing deck show you the entire process by which the dam has ceased to be an obstruction to the salmon migration.