The Trent-Severn Waterway is a canal system for pleasure boats connecting Lake Ontario to Lake Huron. Its major natural waterways include the Trent River, Otonabee River, Kawartha Lakes, Lake Simcoe, Lake Couchiching and Severn River.
It traverses Southern Ontario's "cottage" country with recreational properties the primary industry along the waterway.
The total length of the waterway is 386 km, beginning at Trenton, Ontario. There are 45 locks, including hydraulic lift locks at Peterborough, Kirkfield, Ontario and Swift Rapids on the Severn River, and a marine railway at Big Chute which transports boats between the upper and lower sections of the Severn.