Culdee Fell is the highest mountain peak on Sodor at a height of 2,046 ft. above sea level. During the Dark Ages, Saint Machan set his sanctuary here and preached the word of God to the Island of Sodor. Now, the mountain is greatly enjoyed by the sightseers and tourists that climb up to the summit every year.

The Culdee Fell Mountain Railway climbs this mountain and has done so since 1900. They had built a hotel near the summit in the 1960's.