Mount Worthington is a mountain summit in the Auriol Range of the Saint Elias Mountains, in Kluane National Park of Yukon, Canada. The mountain is situated above the shores of Kathleen Lake, northwest of Kings Throne Peak across the lake, and south-southeast of Haines Junction, Yukon. The mountain can be seen from the Haines Highway as it prominently rises above the lake. The mountain's name was officially adopted August 12, 1980, by the Geographical Names Board of Canada. Based on the Köppen climate classification, Mount Worthington is located in a subarctic climate with long, cold, snowy winters, and mild summers.