It is located 20 kilometers (12 mi) west of Grande Prairie in the Peace River Country, on the southern shore of Saskatoon Lake.

The park takes its name from a large island that was once in the middle of the lake, where Cree natives would pick saskatoon berries to use in pemmican.

It was eventually abandoned after 1924, when the Grande Prairie-Grande Cache Railway missed the settlement by 9 kilometers (5.6 mi) when it was constructed on a more southern route through Wembley instead.

[2] The lake and surrounding shrubland and aspen parkland are home to a variety of bird species such as tundra swans, Canada geese and northern harriers.

Mammals are also present in the park and surrounding areas; species observed include moose, snowshoe hares, weasels, groundhogs, muskrats, beavers, deer and coyotes.