Lock 44 — Lock 44 – Big Chute Marine Railway

🟢 Operable as of Sep 19 🔄 Synced 4:00pm ET ⬆ Lift: 17.68 m58 ft 📏 Chamber: 30.5 m × 7.3 m 100 ft × 24 ft 📍 KM 374.1 / Mile 232.5 ⬇ Downstream / Northbound 📡 VHF Ch None 🗺 CHS Chart #2029-1 Only Operational Marine Railway in North America – Max Beam 24 ft (7.3 m) – Max Length 100 ft (30.5 m) – Max Weight 99 tonnes – Lines Stay Inboard – Remove All Fenders
Lock Number
44
Overnight Tie-Up
✔ Yes
Electricity
✗ None
Potable Water
✔ Yes
Restaurants
Big Chute Marina on-site — restaurant, variety store, repairs
Lock Phone
Overview — Lock 44 – Big Chute Marine Railway
Lock 44 Big Chute is a marine railway — NOT a conventional lock. Vessels are floated onto a motorized steel cradle, lifted clear of the water, and transported overland on rails to the reach below. Strict vessel size and draft limits apply — maximum length 30.5 m / 99.2 ft, maximum beam 7.3 m / 24 ft, maximum draft 1.8 m / 6 ft, maximum weight 99 tonnes. Confirm vessel dimensions with Parks Canada before arrival. Channel markers remain reversed from the Lake Ontario convention since Lock 36 Kirkfield.

Lock 44 Big Chute sits at Kilometre 374 on the Severn River, deep in the Canadian Shield country of the Township of Georgian Bay. It is the only marine railway of its kind in North America and the most distinctive structure on the entire Trent-Severn Waterway. Rather than raising or lowering vessels within a water-filled chamber, Big Chute uses a motorized steel carriage running on four parallel rails to haul boats completely out of the water and transport them overland across the granite ridge that separates the upper Severn River from Gloucester Pool — a vertical change of 17.7 m / 58 ft. From here, Georgian Bay lies just 13 km / 8 miles downstream through Gloucester Pool, with only Lock 45 at Port Severn remaining before open water.

A marine railway has operated at Big Chute since 1917, when wartime shortages of manpower and concrete prevented construction of the conventional lock originally planned. That first railway could carry only one vessel at a time and had a capacity of just 18 tonnes. It was replaced in 1923, and the current marine railway opened to the public in 1978. The modern carriage is 24.4 m / 80 ft long, rides on four parallel rail tracks, and is hauled by four steel wire ropes powered by four electric motors. It can transport up to nine smaller vessels at once, arranged three abreast in individual adjustable slings. Lock 43 at Swift Rapids also operated as a marine railway from 1917 until it was replaced by a hydraulic lock in 1965, making Big Chute the sole surviving marine railway on the waterway. The facility also serves a critical environmental role — by lifting vessels clear of the water rather than passing them through a shared water chamber, the railway helps prevent the spread of invasive sea lamprey into Lake Simcoe and the inland lakes.

Approaching from upstream, vessels tie to the painted blue line on the port-side wall or secure to one of two floating docks extending into the staging basin. Parks Canada staff call vessels to the carriage over a loudspeaker — the first boat on the blue line is not always the first called. Remove all fenders before driving slowly onto the carriage, where the crew positions the vessel in adjustable slings. The overland transit takes approximately seven minutes as the carriage creeps across the road and down the incline to the lower reach. Larger vessels rest directly on the carriage platform rather than being suspended in slings. Below Big Chute, be aware that considerable discharge from the adjacent power generating station creates a cross current, and the winding channel through Little Chute approximately 1.6 km / 1 mile downstream narrows to just 15.2 m / 50 ft with strong variable current.

Official NameLock 44 — Big Chute Marine Railway Parks Canada
Lock Number44
GPS Coordinates44.8842°N, 79.6715°W [VERIFY — Parks Canada]
Street Address7001 Upper Big Chute Rd, Coldwater, Ontario Parks Canada
KM MarkerKM 374 / Mile 232.5 CHS CEN309
RegionTownship of Georgian Bay, Ontario
Water BodySevern River — Upper Severn to Gloucester Pool
CHS Nautical Chart#2029-1 CHS CEN309
Nearest MunicipalityColdwater, Ontario
Historic ConstructionFirst marine railway 1917; replaced 1923; current railway opened 1978 Parks Canada
Lock Phone(705) 756-8802 Parks Canada
Emailtrentsevern@pc.gc.ca

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Lock Technical Details — Lock 44 – Big Chute Marine Railway
ParameterMetricImperial
Lock Number44
Average Lift17.68 m 58 ft
Chamber Length30.5 m100 ft
Chamber Width7.3 m24 ft
Maximum Draft System-wide1.8 m6 ft
Gate TypeMarine railway
VHF Channel Channel None
Operating Season Parks CanadaMid-May to mid-October
Max Mooring Period Parks Canada5 nights
Permit RequiredYes — 1‑888‑773‑8888 or parks.canada.ca
Electricity ✗ Not Available
Potable Water ✔ Available
Pump-Out ✗ Not Available
OperatorParks Canada — Environment and Climate Change Canada
Lock Phone Parks Canada(705) 756-8802
Nearby Anchorages — Lock 44 – Big Chute Marine Railway

▲ Above Lock

Lost Channel — Severn River › 7–25 ft  ·  ~4 km
Wood Bay & Pretty Channel (Big Chute) › 7–12 ft  ·  ~5 km

▼ Below Lock

Gloucester Pool — Whites Bay (Port Severn) › 10–12 ft  ·  ~2 km
Parks Canada overnight tie-up also available at Lock 44 – Big Chute Marine Railway — maximum 5 nights. See §3 for permit details.
Marina & Fuel Services — Lock 44 – Big Chute Marine Railway
No fuel dock is directly at Lock 44 – Big Chute Marine Railway. Refer to adjacent lock pages for the nearest fuel source.
No marinas are catalogued near Lock 44 – Big Chute Marine Railway. Check adjacent lock pages for nearby marina options.
Location Map — Lock 44 – Big Chute Marine Railway

📍 GPS: 44.8847°N, 79.6742°W · 7001 Upper Big Chute Rd, Coldwater, Ontario, Severn Township, Muskoka, Ontario, ON · Get Directions ↗ · Street View ↗

For navigation, use CHS Chart #2029-1 — this map is for reference only and should not be used for marine navigation.

Nearby Town & Amenities — Lock 44 – Big Chute Marine Railway
🚖 Taxi / Transit
☎ Big Chute Marina — Seasonal Water Taxi — (705) 756-2641 — Seasonal water taxi between Lock 44 (Big Chute) and Lock 43 (Swift Rapids). On-water transportation only — inquire at marina for availability. 🔗
No road taxi, rideshare (Uber/Lyft), or public transit service available at Lock 44. This is one of the most remote locations on the entire TSW.

Boater Orientation Notes:

  • Lock 44 is one of the most remote locations on the TSW — ~20 km north of Coldwater, ~15 km east of Port Severn. No confirmed road taxi or transit.
  • Big Chute Marina (~200 m, across the road) is the ONLY commercial business within walking distance — restaurant, variety store, fuel, propane, and marine services.
  • Nearest grocery, LCBO, pharmacy, hardware, and laundromat are in Port Severn (~15 km) or Coldwater (~20 km) — both require a vehicle.
  • Max mooring at blue line: 2 nights. Parks Canada boater camping permitted on lock grounds. Visitor Centre has observation deck and interpretive displays.
  • Big Chute Marina has gas (no diesel), pump-out, propane exchange (20/30/100 lb), transient slips to 45 ft, and monitors VHF Ch 68.

🛒 Grocery


NameDirectionsPhoneRatingDistanceAccess
Big Chute Marina Store 🔗Let’s Go!(705) 756-2641⭐ 4.2200 mWalkable

🍴 Restaurants


NameDirectionsPhoneRatingDistanceAccess
Big Chute Marina Restaurant 🔗Let’s Go!(705) 756-2641⭐ 4.2200 mWalkable

🏛 Local Interests


NameDirectionsPhoneRatingDistanceAccess
Big Chute Hydro Generating Station — Interpretive DisplayLet’s Go!N/A⭐ N/A200 mWalkable
Big Chute Marine Railway — Parks Canada Visitor Centre 🔗Let’s Go!(705) 750-4900⭐ 4.8On-siteWalkable
Big Chute Picnic Grounds and Boater Campground 🔗Let’s Go!(705) 750-4900⭐ N/A100 mWalkable
Old Marine Railway (Little Chute) — Historic SiteLet’s Go!N/A⭐ N/A300 mWalkable

🔧 Support & Services


NameDirectionsPhoneRatingDistanceAccess
Big Chute Marina — Marine Services 🔗Let’s Go!(705) 756-2641⭐ 4.2200 mWalkable

Last Updated: March 18, 2026

Captain Dustin’s Tips — Lock 44 – Big Chute Marine Railway
🧭 Skipper Intelligence Pending
Captain Dustin’s on-the-water cruising intelligence for Lock 44 – Big Chute Marine Railway is being compiled from first-hand experience and verified field sources. Expect docking strategy, overnight notes, congestion timing, and local supply intelligence. Check back soon.
Hazard Warnings — Lock 44 – Big Chute Marine Railway
⚠ Channel Markers Reversed

Post-Kirkfield: red and green channel buoys are on opposite sides from the lower system. Red-right returning applies southbound, not northbound. Verify with CHS Chart #2029-1 before transiting. CHS CEN309

⚠ Site-Specific Hazards Pending

Shoal locations, rock hazards, and current data for Lock 44 – Big Chute Marine Railway are being compiled from CHS CEN309 and current Notices to Mariners. Check notmar.gc.ca for active advisories. CHS

Always verify active Notices to Mariners at notmar.gc.ca before transiting this area. High water conditions reduce all clearance values — confirm with Parks Canada lock staff during elevated water periods.
Live Weather — Lock 44 – Big Chute Marine Railway
📍 Centered on: 44.8847°N, 79.6742°W
🌞 Default layer: Wind (ECMWF model)
🌡 Toggle temperature, rain, and radar via the layer selector (top right)
🔍 Zoom level: 11 (regional waterway view)
📡 Data source: Windy.com / ECMWF forecast model

Weather data for navigation planning purposes only. Always check Environment and Climate Change Canada’s official marine forecast before making operational decisions. weather.gc.ca ↗

Video Guide — Lock 44 – Big Chute Marine Railway
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