Lois Hole Centennial Provincial Park was established on April 19, 2005, becoming the 69th provincial park in Alberta. The park contains the former Big Lake Natural Area and an additional 302 hectares of Crown land, for a total of 1421 hectares.

The dominant feature is Big Lake, which makes up about 59 per cent of the park’s total area. The lake is eight kilometres long and three kilometres wide at its widest point