Located on one of the many islands of Lake of the Woods, Sioux Narrows Provincial Park is surrounded by thousands of other islands and connecting waterways -- remnants of glacial Lake Agassiz, which once covered the ancient bedrock of the Precambrian Shield.

Evidence of the area's glacial past is also evident in the marks gouged in the bedrock, and by the erratics found here. Erratices are huge boulders left behind by the massive fields of ice.

The rich soil deposited by ancient Lake Agassiz supports a forest of aspen, maple, birch, red and white pine, balsam and cedar. Wildflowers such as bunchberries, pasture roses, daisies, and spotted touch-me-nots bloom from spring to fall, complementing the wide variety of moss- and leaf-greens on the forest floor. There is also a variety of edible plants - hazelnuts, blueberries, raspberries, strawberries and sand cherries.

Chipmunks, squirrels and snowshoe hares are sure to be seen at the park. On occasion you will see a white-tailed deer or even a black bear. Bald eagles, ospreys and cormorants breed on the nearby islands. The beach and shoreline are good places to spot loons, great blue herons, white pelicans, and sapsuckers.