Kathleen Lake (native name : Mät'àtäna Mǟn meaning 'something frozen inside lake')[1] is a lake in Yukon, Canada, located south of the town of Haines Junction within Kluane National Park and Reserve.

It hosts a day-use area, a boat launch, a campground, and several hiking trails, including the challenging 3.1 mi (5 km) ascent to King's Throne, a natural, glacially-formed amphitheater overlooking the lake.

[2] Kathleen Lake is characterized by exceptionally clear waters and the presence of kokanee salmon, a landlocked population of sockeye living and reproducing solely in freshwater bodies.

[3] Located at an elivation of 731 m (2,398 ft) it is the largest lake wholly within the national park's boundaries, with an area of 3,376 ha (8,340 acres), a maximum depth of 111 m (364 ft) and an average depth of 52.2 m (171 ft).

[4] Kathleen Lake was named for a girl from Berwickshire County, Scotland, left behind by William "Scotty" Hume (1868–1950), a North-West Mounted Police constable (Reg.