The Hamlet Swing Bridge crosses the Severn River at Hamlet, between Couchiching Lock and Swift Rapids. It carries 8 ft of closed clearance and shows a fixed red light from each side at 16 ft elevation. Operating status on this page is synced from the Parks Canada lockstation listing — the northern section of the waterway has seen mid-season closures, so confirm the current listing before planning passage.
| GPS Coordinates | 44.7625°N, 79.4145°W |
| Water Body | Severn River |
| Region | Muskoka & Georgian Bay |
| KM Marker | KM 342.5 |
| Mile Marker | MM 214 |
| Bridge Type | Swing Bridge |
| Bridge Number | #57 Parks Canada |
| Adjacent Lock | Lock 42 — Couchiching (~5 km NW of lock) |
| Closed Clearance | 2.4 m 8 ft CHS |
| Overhead Cables | 15.2 m 50 ft |
| Status | Operable |
| Operating Hours | SHUTDOWN — not currently operating (as of May 2026) |
| Signal Requirements | Fixed red light at 16 ft elevation on each side (when operating) |
Located on the Severn River at Hamlet, between Couchiching Lock (Lock 42) and Swift Rapids (Lock 43). When operating, shows a fixed red light at 16 ft elevation from each side.
Watch for the submerged crib with only 7 ft of water over it, lying mid-channel about 200 ft downstream of the overhead cable near KM 343. The northern section has a history of mid-season closures — confirm the current Parks Canada status before committing to a run through Locks 42 to 45.
Overhead power cable near KM 343: 50 ft (15.2 m). Submerged crib with 7 ft of water over it lies mid-channel about 200 ft downstream of the overhead cable. Muskoka Road bridge on approach from Lake Couchiching: 22 ft clearance.
The Severn River section from Couchiching Lock to Georgian Bay is the least developed and most tranquil portion of the TSW, with fewer facilities but outstanding natural scenery.
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