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Thayer Lake

Keweenaw County, Michigan Lake Connected Water
107.8 acres18 ft deep1 launchFree launch available
Thayer Lake Access Map 1 launch
Depth Map → Click markers for details
Boat Launches on Thayer Lake
Thayers Lake Boat Launch
McLain State Park · Carry-in only ramp, 0 lane, 2 trailer spots
Open Kayak Free
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Connected Waterways

Limited data on inflows and outflows. Thayer Lake sits in the remote interior of the Keweenaw Peninsula, surrounded by logging country.

Winter & Ice Safety

At 18 feet max depth, Thayer Lake should freeze reliably in a typical Keweenaw winter. However, the logging road access could be impassable or very difficult in winter conditions — check road status before attempting a trip.

Frequently Asked Questions
How do you get to Thayer Lake?
Thayer Lake is about 1.5 miles down a dirt logging road. The road is narrow and rough — watch for logging trucks, especially on weekdays. There's no designated parking area at the lake, so plan accordingly and bring a vehicle that can handle unpaved roads.
How deep is Thayer Lake?
Thayer Lake has a maximum depth of 18 feet — a shallow lake overall. The bottom is weedy, which creates good fish habitat but can snag lures.
What fish are in Thayer Lake?
Smallmouth bass are the main draw. The lake is weedy, so locals recommend weedless rigs or topwater lures to avoid constant snags. Expect a shallow, productive warm-water fishery.
Is there a boat launch on Thayer Lake?
There's one launch site, but don't expect a paved ramp or parking lot. This is a primitive access point best suited for kayaks, canoes, or small cartop boats. Trailering a larger boat down the logging road would be challenging.
Can you camp at Thayer Lake?
Yes — there's a campground nearby called Thayer Lake. Reviews describe basic sites in a remote, wooded setting. Don't expect full hookups or amenities.
Can you swim in Thayer Lake?
You could, but there's very little accessible shoreline and no beach. The lake bottom is weedy. It's more of a fishing and paddling destination than a swimming spot.
Is Thayer Lake crowded?
Not at all — this is one of the most remote and undeveloped lakes you'll find. The difficult access keeps traffic low. Expect solitude, especially midweek.
Scout's Notes
Lake Vibe & Fishing Intel

Thayer Lake is a small, shallow lake tucked into the Keweenaw Peninsula woods — max depth of 18 feet, accessed via a 1.5-mile dirt logging road. This is not a developed recreation lake. There's no real parking area, limited accessible shoreline, and you'll share the narrow road with logging trucks. But if you're looking for a quiet, off-the-grid spot to drop a small boat or kayak, it delivers. The lake has a reputation for smallmouth bass, though the weedy bottom means you'll want to bring weedless rigs or topwater lures. There's a campground nearby for those who want to make a trip of it.

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

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