Boating on Lake Simcoe: routes, launches and wind

If you're buying on Lake Simcoe for the boating, two questions matter more than the boat itself: where you can go from your dock, and how often the lake will let you. Lake Simcoe is part of the Trent-Severn Waterway, with a connection at each end of Jordan's stretch of shore. It's also a big, open lake. The LSRCA puts it at 722 square kilometres, with about 240 km of shoreline and a deepest point of 42 metres near the mouth of Kempenfelt Bay.

How does Lake Simcoe connect to the Trent-Severn?

Parks Canada describes the Trent-Severn as a 386 km waterway, first opened end to end in 1922 to connect Lake Ontario and Georgian Bay. Lake Simcoe sits in the middle, and you leave it one of two ways.

Direction	Where you leave Lake Simcoe	What's next	Locks
East, toward the Kawarthas and Lake Ontario	Lock 41 – Gamebridge, at the mouth of the Talbot River	The Talbot River section	Five manual locks in 8 km, total lift 22.2 m
North, toward Georgian Bay	The Atherley Narrows	Lake Couchiching, then Lock 42 – Couchiching near Washago and the Severn River	No lock at the Narrows

The east end: Lock 41 and the Talbot River

Parks Canada calls Lock 41 – Gamebridge "the gateway to the beautiful and historic Talbot River section." It's the first of five manual locks in an eight-kilometre stretch that climbs a total of 22.2 metres, an average of about 3.5 m per lock. Its posted address is on Region Road 50 with a Beaverton mailing address, about five minutes north of Beaverton on Highway 12. The station has washrooms, potable water, a picnic area and overnight mooring for up to two nights.

For boaters in Lagoon City, Brechin and along the Ramara shore, Lock 41 is a short run down the east side. See Lagoon City and Brechin and the Ramara shore.

The north end: the Atherley Narrows

At the north end, Lake Simcoe flows into Lake Couchiching through the Atherley Narrows, with no lock in between. Parks Canada notes that portions of the Narrows bottom are the Mnjikaning Fish Weirs National Historic Site, and that the navigation channel was first dredged in 1856–57. Its 2025 management statement says samples from the oldest wooden stakes have been carbon-dated to more than 5,000 years, and that the underwater site is vulnerable to boating activity. In 1993, stakes threatened by erosion, boat traffic and fishing pressure were removed under the oversight of the Mnjikaning Fish Fence Circle. Stay in the marked channel and keep your wake down.

Past the Narrows, Lock 42 – Couchiching sends you down the Severn River toward Georgian Bay. Parks Canada calls it "a very busy lock station on weekends," with many boaters running between Lake Simcoe and Georgian Bay. For what lies on the Couchiching side, see lakecouchichinghomes.com, and for the Narrows area as a place to own, see Atherley and the Orillia end.

Where can you launch or dock near Jordan's area?

Each municipality runs its own launches with its own parking rules, and they change often, so check before you go.

Area	Launch or marina	Notes
Barrie (Kempenfelt Bay)	City of Barrie Marina, 55 Lakeshore Drive	128 slips for boats 22' and under, 215 slips with hydro for larger boats up to 60'; dual concrete public launch ramp; Blue Flag eco-label since 2015
Barrie	Transient Marina, base of Bayfield Street	Room for 50 boats from 16 to 100 feet, with shore power
Barrie	Tiffin Boat Launch, Tiffin and Lakeshore	Free for Barrie residents, fee for non-residents; 31 trailer spaces, April 1 to November 30
Oro-Medonte	Line 9 Boat Launch, 871 Lakeshore Road E.	Permit parking year-round
Oro-Medonte	Carthew Bay Boat Launch, Lakeshore Road E. at Line 14 S.	Permit parking year-round
Oro-Medonte	Shanty Bay Wharf, 25 Bay Street; Bayview Memorial Park, 687 Lakeshore Road E.	Permit parking year-round
Ramara	Atherley Community Park, Glenrest Drive, Courtland Street (all gravel) and Suntrac Drive (paved)	No docks at any Township launch; limited or permit parking, and Suntrac is a 15-minute loading zone only

Oro-Medonte gives residents two free digital parking permits; non-residents buy them online. Ramara says its launches aren't maintained in the water and aren't suitable for every boat, so look at the ramp before you back a heavy boat down it.

If you're buying a property without its own deep-water dock, the nearest launch and how you'll park there are part of the deal. Barrie's seasonal slips run on a waitlist, so don't assume one will be available the summer you close.

How rough does Lake Simcoe get?

Rougher than many buyers expect. On a small lake, the wind has a few hundred metres to build waves. On Lake Simcoe, it can have many kilometres of open water behind it, and the waves arriving at your dock depend on which direction the wind blows and how much lake sits upwind.

That's why the same day can be calm in a sheltered bay or canal and unsafe off an exposed point. An exposed shoreline also takes more wave and ice action, which affects the dock you can keep, as covered in docks, boathouses and permits and what drives Simcoe prices.

Environment and Climate Change Canada issues a recreational boating forecast for Lake Simcoe three times a day (5 a.m., 11:30 a.m. and 5 p.m.) from May 1 to November 30. It does not include wave heights. ECCC's marine warning scale starts with a strong wind warning at 20 to 33 knots, issued during the same May-to-November season. ECCC forecasts are also available on the Canadian Coast Guard's continuous marine broadcast on VHF.

What should a boating buyer check before making an offer?

• Depth at the dock, measured in late summer or fall when the lake is drawn down, not in June. Lake levels on Simcoe and Couchiching are managed together by Parks Canada; see water levels on Couchiching.
• Bottom type. Sand, weed, rock or shoals off the shore all affect where you can moor and how you approach.
• Route to open water. In Lagoon City, how far through the canals, and how weedy in July. Elsewhere, any shoals or bars between the dock and deep water.
• Distance to the locks, if Trent-Severn trips are the plan: Lock 41 from the east side, or the Narrows and Lock 42 from the north.
• Permits for the dock, boathouse and lift. See Lake Simcoe shoreline rules.
• Water quality and beach advisories if swimming off the dock matters. See water quality and lake health.

How Jordan can help

Jordan Rossman can help you match a Lake Simcoe property to the boating you actually plan to do, whether that's a canal slip with quick lock access in Ramara, a deep-water dock on the Oro-Medonte shore or a short run to the Narrows from the Orillia end. He can help you line up the depth, exposure and permit questions before you write an offer. Call 705-345-0797.