From Parks Canada:

Get ready to experience the wildest hike on the wildest shore of all of the Great Lakes. Pukaskwa National Park’s 60 km Coastal Hiking Trail is an adventurer’s dream that offers a challenging but rewarding premiere Ontario wilderness experience. The trail climbs steep Lake Superior coastline, meanders through sandy and cobble stone beaches, and treks through rugged boreal forests.

The Tiny-Wasaga Beach side trail is a connected side trails of the ~500km Ganaraska Trail. 

The Tiny Trail starts with approx. 14km of rail trail, followed by the beautiful Tiny Marsh Provincial Wildlife Area before running on country roads into Wasaga Beach.