High Quality Content by WIKIPEDIA articles! Mount Cleveland is the highest mountain in Glacier National Park, located in Montana, United States. It is also the highest point in the Lewis Range, which spans part of the northern portion of the Park and extends into Canada. It is located approximately 3 mi (4.8 km) southeast of the southern end of Waterton Lake, and approximately 5 mi (8.0 km) south of the US/Canada border.