[3] The park includes Bigsby, Coste (partially), Dawson, De Noyon, Falcon, Kennedy, Lily, Painted Rock, Skeet (partially), Splitrock, and The Three Sisters Islands, as well as the western tip of the Aulneau Peninsula.

The islands added to the park in 1985 (Bigsby, Dawson, Painted Rock, Splitrock, and The Three Sisters) are classified as a nature reserve zone, and therefore, future development of them will be limited.

[5][6] The islands have similar terrain which includes rolling bedrock uplands mixed with many lakes and other wetlands.

After it became a provincial park, the campground was a loss leader, losing thousands of dollars per year.

As part of the settlement, the mainland portion of the park was deregulated, and converted into the Assabaska Reserve for the Big Grassy and Ojibways of Onigaming First Nations.