
The most extensive areas of beaver activity exist along the Kalonga Valley wetlands which lie south of Helve Lake, and the McReynold Valley on the west side of Lake Solitaire. The Kalonga River drains the valley flowing westward into Lake Solitaire.

The Kalonga Valley wetlands are the headwaters for a series of lakes, starting with Lake
Solitaire and including Clear, Turtle, Rebecca and Bella Lakes. The McReynold Valley drains the west side of Solitaire from Fowler and Eastall Lakes through extensive wetlands populated by beaver activity. The valley drains into the Boyenne River which crosses Millar Hill Road and eventually flows into Lake of Bays.

The east side of the reserve drains from High Lake down a valley with steep sides and five lakes with few wetlands and beaver dams. There are, however, a few bank beavers active in the area. Wetlands perform the key ecological function of filtering out harmful impurities from runoff water and dealing with excess nutrients.

The Kalonga Wetlands rank among the most diverse and accessible wetlands in the Algonquin region. This makes them an ideal laboratory for students to conduct biological and environmental studies.