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Ontonagon River - South Branch

Ontonagon County, Michigan Inland Lake Connected Water
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Ontonagon River - South Branch Access Map 1 launch
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Boat Launches on Ontonagon River - South Branch
Ewen Boat Launch
Lake Gogebic State Park · Carry-in only ramp, 0 lane, 8 trailer spots
Open Kayak Rec Passport
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Connected Waterways

The South Branch is one of several major tributaries of the Ontonagon River, which flows 25 miles north to Lake Superior at the village of Ontonagon. The river system includes the East Branch, Middle Branch, and West Branch as well, all converging to form the main stem. The watershed drains a large swath of the western Upper Peninsula's forested interior.

Frequently Asked Questions
Where is the South Branch of the Ontonagon River?
It's in Ontonagon County in Michigan's western Upper Peninsula. The South Branch is one of several tributaries that merge to form the main stem of the Ontonagon River, which flows north into Lake Superior at the village of Ontonagon.
Can you launch a boat on the South Branch of the Ontonagon River?
There is one launch site on the South Branch. This is a river launch suited for canoes, kayaks, and small boats — not a large lake-style ramp. Expect current, shallow areas, and natural obstacles typical of Upper Peninsula rivers.
What fish are in the South Branch of the Ontonagon River?
The Ontonagon River system supports brook trout, brown trout, and seasonal steelhead runs. Smallmouth bass may also be present in some stretches. Spring and fall are the prime fishing seasons, particularly for migratory fish moving up from Lake Superior.
Is the Ontonagon River a Wild and Scenic River?
Yes — portions of the Ontonagon River's branches have been collectively designated as a National Wild and Scenic River. This protects the free-flowing character of the river and limits development along designated stretches.
Are there waterfalls near the South Branch of the Ontonagon River?
The Ontonagon River system includes several notable waterfalls, most famously Bond Falls and Agate Falls. Both are popular scenic stops and are accessible by road in the broader Ontonagon County area.
Is the South Branch of the Ontonagon River good for kayaking or canoeing?
It's a legitimate backcountry paddling river — expect a mix of flatwater and moving current with natural obstacles like downed trees and rocky stretches. This isn't a groomed canoe trail; come prepared for real river conditions and scout ahead if you're unfamiliar with the route.
Scout's Notes
Lake Vibe & Fishing Intel

The South Branch of the Ontonagon River is one of several major tributaries that feed the Ontonagon River system in Michigan's western Upper Peninsula. The main stem of the Ontonagon runs 25 miles to Lake Superior at the village of Ontonagon, but the branches extend much farther into the rugged, forested interior of Ontonagon County. Portions of the river system carry National Wild and Scenic River designation, and the watershed is home to notable waterfalls including Bond Falls and Agate Falls. This is remote, wild country — expect limited development along the shoreline and genuine Upper Peninsula solitude.

The South Branch access point is one of just a handful of launch options on this river system. It's primarily a paddling and fishing river rather than a powerboat waterway — expect shallow stretches, current, and rocky substrate. The river holds brook trout, brown trout, and steelhead depending on the reach and season, with spring and fall runs drawing anglers from across the U.P. If you're launching here, you're looking for backcountry river experience, not a day at the lake.

Sources: Wikipedia, Google Reviews, DNR data, campground & beach reviews, ShorelineScout enrichment