The Uphill River is a strange river found in Concavia.
Found in the underground kingdom of Concavia, the Uphill River is an inexplicable water formation that takes the form of a river that runs upwards. Mickey Mouse sailed up Uphill River in 1954 to return to the surface world after his trip to Concavia, and discovered that the Uphill River ended in the Old Reliable geyser on the surface.
Behind the scenes
The Uphill River appears in the 1954 story A Fatal Occupation.