St. Clair River

Photo: Bjoertvedt, Wikimedia Commons, CC BY-SA 3.0

The St. Clair River is not your typical paddling stream — it is one of the world's great natural waterways. This 40-mile international strait drains the entire upper Great Lakes, pouring billions of gallons of fresh water from Lake Huron down to Lake St. Clair on its way to the Atlantic. It forms the border between Michigan and Ontario, and its shipping channel carries thousand-foot lake freighters past a string of classic Michigan river towns: Port Huron, Marysville, St. Clair, Marine City, Algonac, and the St. Clair Flats.

Let's be clear: this is advanced paddling water, not beginner water. The current runs strong — typically 2 to 2.5 knots, and up to 4 to 6 knots under the Blue Water Bridge at Port Huron — and you share the river with freighters, powerboats, and their wakes, plus floating logs and debris. Kayaking the St. Clair means staying well clear of the shipping channel, hugging the shoreline, paddling only in calm weather, and treating every crossing with the respect you'd give a busy highway. Experienced paddlers do it and love it — there is nothing quite like drifting past a passing freighter at a respectful distance — but this is not the place to learn the sport.

The good news is that access for paddlers has improved greatly. The region's water-trail efforts have brought ADA-accessible kayak launches to the riverfront at the City of St. Clair Marina, the Marysville Boat Launch, River Front Park in Fort Gratiot Township, and Baker's Field Park in Port Huron Township. These launches let you put in right on the river for nearshore paddles — float along the waterfronts, watch the freighters from shore-hugging water, and take out where you started. Go early on calm summer mornings, paddle with a partner, carry a VHF radio or at minimum a fully charged phone in a dry bag, and stay out of the marked channel at all times.

At a Glance

• Approximate length: 40 miles, from Lake Huron at Port Huron to Lake St. Clair
• Difficulty: Intermediate to advanced — strong current (2–6 knots) and heavy boat traffic; not for beginners
• Water character: Big, fast, international shipping strait; nearshore water is the paddler's zone
• Best season: Summer, on calm, low-wind mornings

Paddling Sections

Hazards & Portages

• Freighter traffic: Thousand-foot ships use the marked shipping channel and cannot maneuver around you. Stay completely clear of the channel, and never cross in front of an approaching vessel.
• Strong current: 2–2.5 knots is typical, with 4–6 knots under the Blue Water Bridge. Do not fight the current — plan downstream or nearshore trips, and expect to work hard to hold position.
• Powerboat wakes: Wakes from passing boats can be large and come from multiple directions. Keep your bow into wakes and stay alert, especially near marinas and no-wake zone boundaries.
• Floating debris: Logs and debris drift down from Lake Huron — keep a lookout, particularly after storms.
• Wind and weather: A long fetch means waves build fast. Paddle calm mornings, check the marine forecast, and get off the water if conditions change.

Access & Parking

Paddler-specific access on the St. Clair River is better than ever thanks to ADA-accessible kayak launches at the City of St. Clair Marina, the Marysville Boat Launch (north of the water treatment plant), River Front Park in Fort Gratiot Township, and Baker's Field Park in Port Huron Township. Parking is at each park or marina lot. Canoe and kayak rentals are available at the St. Clair City Marina. Always launch with a plan: know where you will take out, tell someone your float plan, and paddle with a partner on this river.

Map

Marker: St. Clair, Michigan — home to the City of St. Clair Marina's accessible kayak launch.