Mountain Lake Colony House, Historic clubhouse in Lake Wales, Florida.

Mountain Lake Colony House is a three-story Mediterranean Revival building featuring decorative pergolas, loggias, and barrel-tile roofing on the north shore of Mountain Lake. The structure combines elegant architectural details with practical spaces designed for community gatherings and events.

The building was designed in 1916 by Frederick Law Olmsted Jr. as part of the Mountain Lake Estates development, reflecting the landscape design ideals of its era. The property received National Register of Historic Places status in 1991.

The Colony House takes its name from the Mountain Lake Colony, the residential development laid out around the lake; the building also appears in records as the Mountain Lake Club House. It was built as a clubhouse and inn serving the estate, and it stands within the Mountain Lake Estates Historic District.

The Colony House stands on the north shore of Mountain Lake, east of State Road 17, inside the Mountain Lake Estates Historic District. It is a private clubhouse and inn, so the building is not open to the general public; access depends on the club.

The Colony House was listed on the National Register of Historic Places on February 22, 1991, the same year its wider setting, the Mountain Lake Estates Historic District, gained recognition. The nomination covers the 1916 clubhouse and inn itself, not the surrounding houses.