Marathons in Michigan

Michigan keeps a deliberately short marathon calendar — just three 26.2s, sorted by date below. The headliner is the Detroit Free Press Marathon, the rare race that crosses into Canada and back, joined by two flat, BQ-friendly speed courses in Grand Rapids and lakeside Bayshore. Each card shows a live countdown, field size and course profile.

Updated 2026-07-20 Sorted by race date. Field sizes and course data are checked against each race's official source.

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About marathons in Michigan

A focused trio, not a crowded calendar. Michigan runs only three established marathons, and they split cleanly across the year. The fall pairing lands on the same mid-October Sunday: the big-city Detroit Free Press Marathon and the flat, fast Grand Rapids Marathon. Then a long gap before the spring single — the Bayshore Marathon in Traverse City, run on the Saturday of Memorial Day weekend along Grand Traverse Bay. The humid Midwestern summer and the snow-bound winter are left for training, not racing.

All three are fast and BQ-eligible. This is a flat state. Bayshore is the flattest at roughly 113 m of climb, a scenic out-and-back beside the bay and a long-standing Top-50 Boston qualifier; Detroit is gentle too at about 118 m; and Grand Rapids (around 236 m) runs flat along the Grand River with only a gently rolling middle stretch. Any of the three is an honest qualifying road — check your target with the Boston Qualifying calculator and the BQ race guide, then lock your splits with the pace calculator.

What makes Detroit different. The Free Press course is the only one here — and one of very few anywhere — that crosses an international border, running over the Ambassador Bridge into Windsor, Ontario and back through the Detroit-Windsor Tunnel's underwater mile. That means every runner needs a passport or other border-compliant ID on race day, even for the full domestic-feeling marathon. Grand Rapids and Bayshore are standard online entries by contrast. Each card's date is checked against official race sources.

Frequently Asked Questions

What is the biggest marathon in Michigan?

The Detroit Free Press Marathon is the state's largest and best-known race, run on the third Sunday of October. It draws runners from across the U.S. and dozens of countries, and its marathon field is the biggest of Michigan's three established 26.2s. The Bayshore Marathon in Traverse City and the Grand Rapids Marathon are both smaller, fast qualifier-style fields.

Which Michigan marathon is flattest or best for a Boston qualifier?

All three are Boston-eligible and genuinely fast. The Bayshore Marathon is the flattest at roughly 113 m of climb — a scenic out-and-back along Grand Traverse Bay long regarded as one of the top Boston qualifying races in the country. Detroit is nearly as gentle at about 118 m, and Grand Rapids (around 236 m) runs flat along the Grand River apart from a gently rolling stretch near miles 7 to 9. Confirm your standard with the Boston Qualifying calculator.

Does the Detroit marathon really cross into Canada, and do I need a passport?

Yes. The Detroit Free Press Marathon is one of the only marathons in the world that crosses an international border: runners head over the Ambassador Bridge into Windsor, Ontario, run a few miles in Canada, then return to the U.S. through the Detroit-Windsor Tunnel — the famous "underwater mile." Because you physically cross the border, every participant must carry a border-compliant document on race day: a valid passport, passport card, enhanced driver's license, or a NEXUS card. Check the race's official documentation page for the current list before you register.

When is marathon season in Michigan?

It splits into two short windows. The fall pairing falls on the same mid-October Sunday — the Detroit Free Press Marathon and the Grand Rapids Marathon — when the air is cool and crisp. The lone spring race, the Bayshore Marathon in Traverse City, runs on the Saturday of Memorial Day weekend in late May. Humid summers and snowy winters mean nothing of note is scheduled outside these windows.

How do you enter the Michigan marathons — lottery or open registration?

None uses a lottery — all three are first-come online registration. The Bayshore Marathon is the one to plan for: it opens around December 1 and sells out fast, with a moving wait-list once it's full. Detroit and Grand Rapids fill more gradually. International runners traveling to the U.S. need an ESTA (visa-waiver countries) or a B1/B2 visa, plus a border-compliant ID if running Detroit's international course.

Which Michigan marathon is best for a first-timer?

For a forgiving debut, the flat profiles all help. Grand Rapids is a low-key, well-shaded riverside course that suits a first marathon without a big-city crush, while Bayshore pairs a flat out-and-back with bay scenery (though you'll need to grab an entry quickly). Detroit offers the most crowd energy and the bucket-list border crossing, just remember the passport requirement. Map your pacing with the pace calculator and set an honest goal with the finish-time calculator.