Despite logging and fire, the park contains some massive old pines. It also contains upland forests of sugar maple and yellow birch, and many examples of white birch, trembling aspen, white spruce, and balsam fir. Mississagi is also host to abundant birdlife. All sites are secluded by trees for family privacy and all have fireplaces and picnic tables. The park is open from mid-May through Labor Day.
Visitors can enjoy canoeing, boating, fishing, hiking and swimming.
Special events such as guided hikes, demonstrations, films, campfire singalongs and guest speakers are provided throughout the summer. Five canoe routes wind through local waterways, across lakes with names like Flack, Helenbar, and Semiwite. Eighty kilometres long, the Little White River Canoe Route offers varied scenery and wildlife. The 32-km Ten Mile Lake Canoe Route crosses a high section of the Laurentian plateau. Many trails wind through the forest, some providing panoramic views from elevated lookouts.