The Ski Slopes are located up a mountain on the Skarloey Railway. In the winter, Thomas brings the skiers to the bottom station and the narrow gauge engines, usually Sir Handel, take them up to the newly-built ski station at the top of the mountain.
There is a blue slope which if for beginners and a red slope for more advanced skiers. There may also be a black slope which is the hardest of all, but that's not confirmed.
The ski slopes appear in the 2001 magazine story, The Hairy Black Run.