The geology of the park is complex, with several distinct zones. Generally, the park terrain is rugged. Frontenac is home to many unusual species of bird including eagle, turkey vulture, red-tailed hawk, cliff swallow, loon, osprey, heron, kingbird, kingfisher, warbler, vireo, red shouldered hawk, and ruffled grouse. White tail deer and black bear are common. Coyotes, red fox, otter, mink, weasel, raccoons and other small mammals abound.
Beavers are also abundant.
In fact, beaver activities, along with the terrain's poor drainage, are two factors behind the many varieties of wetlands found here. With more than 170 kilometers of trails some winding through the Moulton Gorge, the Arkon Lake Bog, the Black Lake homestead, the Crab Lake Mine, and other interesting sites. The many lakes provide good canoeing, linked with clearly marked portages. The park also offers swimming, fishing and hiking. Visitors can obtain permits at the trail center on Otter Lake, and head out from there, on foot or by canoe, into the park's interior.