The protected area includes several small islands, including Bird, Royal, and Coney. The northernmost inlet for Last Mountain Lake, Lanigan Creek and its tributary Saline Creek, runs through the heart of the park. Several dykes were built to help control water flow and levels. Natural grasslands make up about 54% of the total protected area. The marshes and grasslands provide habitat and breeding grounds for about 280 species of migratory birds. of the park is dominated by native species. Within the park, there are trails, a picnic area, a Nature Centre, and Last Mountain Bird Observatory, Saskatchewan's only bird monitoring station.
