Founded in 1902, Mt. Ellis Academy includes boys and girls dormitories, an Administration building, gymnasium, and other facilities. Mt. Ellis operates a ski area on US Forest Service land about 3 miles (4.8 km) from the school in Bear Canyon. The academy sits on a 500-acre (2.0 km2) campus.
During peak years in the 1960s, Mt. Ellis had nearly 200 students. In recent decades enrollment has trended downward and stood at about 70 students for the 2005- 2006 school year. According to a 2001 report, out of over 100 private schools in Montana, Mount Ellis was one of only ten accredited under state education standards.
In 2010, Kohl's started a Facebook contest for schools in the US to win $500,000. Mt. Ellis Academy entered this contest and came out in 10th place with 144,006 votes. After the authentication of votes process, they were in 9th place. Part of the campaign for votes was the saying, "Vote for our Sewers!" coming from the fact they planned to use the $500,000 to upgrade their 1950s era sewer system. At the Academy and in the Church, this is spoken of as a miracle.