Michigan Thumbcoast Antique Yard Sale Trail 2026: Map & Route Guide

For one weekend at the start of August, the shoreline roads that ring Michigan's Thumb turn into a long ribbon of yard sales, barn sales, and small-town antique stops. The Thumbcoast Antique Yard Sale Trail follows the water — up M-29 along the St. Clair River from New Baltimore, through Port Huron where M-25 takes over, then north along the Lake Huron shore around the tip of the Thumb and down the Saginaw Bay side toward Bay City. Drive the whole thing and it is well over a hundred miles of coast, strung across the harbor and farm towns of the Blue Water and Thumb country. The 2026 edition runs Friday, August 7 through Sunday, August 9.

Roughly 177 miles of shoreline is far more than most people cover in a day, and that is the point: the Thumbcoast is a route you graze, not a race you finish. The sales spread across ten anchor towns with no central organizer, so the difference between a great haul and a long lakeside drive comes down to picking your stretch and knowing the coast. Here is how to plan it.

The lay of the land

Michigan's Thumb is exactly what it sounds like — the mitten's thumb, jutting into Lake Huron above Detroit. The Thumbcoast trail wraps its eastern edge along the water, and it is easiest to picture in three stretches: the St. Clair River run at the south, the Lake Huron shore up the outside, and the Saginaw Bay side coming back down toward Bay City.

This is old resort-and-farm territory. The lakeside towns filled with summer cottages a century ago, and behind them lie generations of Thumb farmland. That mix is what makes the sales worth the drive: cottage attics and farm barns getting cleared out in the same weekend, along a coast that most of the state drives right past.

The route, south to north

• New Baltimore (south end) — the start, on Anchor Bay at the top of Lake St. Clair. Pick up M-29 here and head north into the river towns.
• Marine City & St. Clair — historic St. Clair River towns with walkable downtowns, antique shops, and big old homes. Classic browsing before you reach Port Huron.
• Port Huron — the hinge of the whole route, where the St. Clair River meets Lake Huron and M-25 begins. The biggest town on the trail: food, lodging, and a good base for either direction.
• Lexington & Port Sanilac — the first of the Lake Huron harbor villages heading north. Small, scenic, and dense with cottage-country finds.
• Harbor Beach — a working harbor town on the outer shore, roughly the midpoint of the Huron stretch and a natural place to break for lunch.
• Port Austin (the tip) — the top of the Thumb, where the shoreline turns west. A beloved summer town and one of the best single stops on the route.
• Caseville & the bay side — around the tip and down the Saginaw Bay shore, a string of beach towns heading back toward the mainland.
• Bay City (west end) — the far anchor at the mouth of the Saginaw River, a full-size city with its own deep antique district to finish on.

The named anchors, south to north around the Thumb, run New Baltimore → Marine City → St. Clair → Port Huron → Lexington → Port Sanilac → Harbor Beach → Port Austin → Caseville → Bay City, all on or beside M-29 and M-25. Those are the natural points to plan around.

One-segment strategy — don't try to drive it all

At 177 shoreline miles, the Thumbcoast is a graze-and-choose route. Trying to run the whole coast in a day means more driving than shopping. Pick a segment that matches where you're coming from and work it well:

• The river run (south). New Baltimore, Marine City, St. Clair, and Port Huron — walkable downtowns and antique shops close together. Best if you're coming up from Detroit and want density over distance.
• The Huron shore (the classic). Port Huron north through Lexington, Port Sanilac, and Harbor Beach to Port Austin at the tip. The prettiest driving and the heart of the cottage-country finds. A full, satisfying day on its own.
• The bay side (north). Port Austin around through Caseville and down to Bay City. Best if you're coming from the Saginaw/Bay City side and want to work back east.

Because there's no organizer posting numbers, density genuinely varies — some stretches will be nearly continuous, others quiet for a few miles between towns. That's the shoreline; keep driving and the next harbor town fills back in.

Getting there

• From Detroit / the south: I-94 to New Baltimore or Marine City puts you on the M-29 river run; stay on it north to Port Huron.
• From the west / I-75: come in at Bay City and work the Saginaw Bay side east and around the tip.
• Into the middle: M-25 is the shoreline road for the entire Lake Huron stretch — pick it up at Port Huron and follow the water north.

What you'll find

The Thumb's mix of lake cottages and working farms shapes the inventory. Cottage attics and farm outbuildings get cleared out together, which means honestly-priced, uncurated goods rather than dealer-booth markups.

Lake-cottage and nautical finds are the signature of the Huron shore — old fishing gear, boat and dock hardware, cabin furniture, camp dishes, and the summer-place odds and ends that a century of shoreline cottages leave behind.

Cast iron and hand tools come out of the Thumb farmsteads inland from the water. Griswold and Wagner skillets, old wrenches and planes, and solid farm-cleanout furniture turn up all along the route — the kind of thing a picker plans a weekend around.

Glassware, primitives, and Americana round it out: vintage kitchenware, stoneware, signage, linens, books and records, and the church and community fundraiser tables that are half the fun of a Michigan sale day.

Pro tips

• Pick your stretch first. 177 miles is too much for one day. Decide on the river run, the Huron shore, or the bay side before you go.
• Bring cash. These are front-yard and roadside sales in small harbor and farm towns; many sellers don't take cards. Hit an ATM in Port Huron or Bay City first.
• Start early on the shore. The Lake Huron harbor towns are the draw — give them your fresh morning before the good cottage finds walk off.
• Make a weekend of it. The Thumb is beach-and-lighthouse country; it's easy to build a whole shoreline weekend around the two or three days of shopping.
• Don't skip the quiet miles. With no organizer, density varies — but there's almost always another stand in the next town up the coast.

FAQ

When is the Michigan Thumbcoast Antique Yard Sale Trail 2026?

Friday, August 7 through Sunday, August 9, 2026 — the first full weekend of August. Most sellers keep roughly 9 a.m. to 5 p.m. each day, though towns along the route set their own hours and the earliest stands open Friday morning.

Where does the Thumbcoast Antique Trail take place?

Along Michigan's Thumb shoreline — up M-29 from New Baltimore along the St. Clair River through Marine City and St. Clair to Port Huron, then north on M-25 up the Lake Huron coast through Lexington, Port Sanilac, Harbor Beach, and Port Austin at the tip, and down the Saginaw Bay side through Caseville toward Bay City. It is roughly 177 miles of coast end to end.

Is there a map or list of the Thumbcoast sellers?

There is no official organizer or central vendor registry. The MapMySales event map pulls together individual listings from Craigslist, Facebook, and community-submitted sales into one searchable map. Sellers can add their own address directly, and it shows up on the map immediately.

What towns are on the route?

From south to north: New Baltimore, Marine City, St. Clair, Port Huron, Lexington, Port Sanilac, Harbor Beach, Port Austin, Caseville, and Bay City — ten anchor towns around the Thumb. Most shoppers pick a stretch rather than driving all of it in one day.

Where should I base for the Thumbcoast Antique Trail?

Port Huron is a natural base at the south end, where M-25 begins and the St. Clair River meets Lake Huron. For the classic Lake Huron stretch, one of the harbor towns — Lexington, Port Sanilac, or Port Austin at the tip — puts you in the middle of the coast.

We'll see you on the shore road.