Hockley Highlands Inn, Former conference center in Mono, Ontario

Hockley Highlands Inn is a former hotel and conference centre of five main buildings on 200 acres (0.81 km2) of forested land sloping toward the Hockley Valley, on the east side of 3rd Line Road in Mono, Ontario. It has been closed to the public since May 2007.

Ontario Hydro built the site in the 1960s as Glen Cross Conference and Training Centre before Goldman Hotels Inc. purchased it in the late 1990s. A decade later, the Church of Scientology Canada acquired the property in 2009 with development plans.

From 2003 to 2007 the inn lent 5,000 square feet (460 m²) to Theatre Orangeville, the professional theatre company based in Orangeville, which used the rooms for set design, prop storage and rehearsals. The company's workshops and stored scenery occupied part of the building while it still operated as a hotel and conference centre.

The inn itself has been closed to the public since May 2007, so there is no access to the buildings or grounds. The Bruce Trail and the Peter Beecham Side Trail still cross the property, and a Scientology representative stated the existing Bruce Trail would not be altered. Walkers stay on the marked trail; the land lies on the Niagara Escarpment, in an Escarpment Protection Area.

The Bruce Trail and the Peter Beecham Side Trail cross the grounds; a Scientology representative stated in 2009 that the existing Bruce Trail would not be altered. The 200 acres (0.81 km2) lie within the Niagara Escarpment Commission's Escarpment Protection Area, which limits use and development.