2026 Detroit Free Press Marathon - Oct 18

2026 Detroit Free Press Marathon - Oct 18 Countdown

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Race Information

Race2026 Detroit Free Press Marathon - Oct 18
CityDetroit
Date2026-10-18 at 07:00
Field Size~3,569 runners
Time Limit6 hours 30 min
TimezoneAmerica/Detroit
Official SiteDetroit Free Press Marathon
RegistrationSold out · Official Site

Race Day Weather

Average Temperature9°C / 48°F
Humidity73%
Wind14 km/h
Rain Chance28%
Typical ConditionsCool, crisp mid-October Great Lakes morning

What to Prepare: Mid-October mornings in Detroit start cool — around 48°F / 9°C at the 7 a.m. gun — usually warming into the low-to-mid 50s°F (11–13°C) by late morning, close to ideal marathon weather. Watch for a damp breeze off the Detroit River, especially on the Ambassador Bridge climb and along the open riverfront. Bring throwaway gloves and a long-sleeve you can shed in the first few miles, and don't overdress.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Wind at 14 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Course Profile

Course TypeInternational loop (two border crossings)
Elevation Gain118m
TerrainRoad (city streets, international bridge and tunnel)
ProfileThe headline is the border: the Detroit Free Press Marathon is the only U.S. marathon that crosses an international boundary, sending runners over the Ambassador Bridge into Windsor, Ontario, Canada around mile 3, then back to Detroit through the Detroit-Windsor Tunnel — the world's only official underwater international mile, the famous 'Underwater Mile' beneath the Detroit River. A valid passport or other WHTI-compliant travel document is required to run. The route is otherwise mostly flat and fast: about +388 ft (118 m) of total climbing against -397 ft of descent, the gain concentrated in the one-mile bridge ascent and the half-mile climb out of the tunnel. After the international section the course tours Woodbridge, the District Detroit, Eastern Market and the Dequindre Cut before finishing at Campus Martius downtown. USATF-certified and a Boston qualifier.
Boston QualifierYes — Check your BQ time

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Frequently Asked Questions

When is the 2026 Detroit Free Press Marathon and what time does it start?

The full marathon is on Sunday, October 18, 2026, starting at 7:00 a.m. ET in downtown Detroit (the Adaptive Athlete division starts a couple of minutes earlier). It is part of a full race weekend on October 16–18 and traditionally runs on the third Sunday in October.

Do I need a passport to run the Detroit Free Press Marathon?

Yes. Because the course crosses into Canada and back, every full-marathon and International Half runner must carry a WHTI-compliant travel document, and you must show it at packet pickup. For U.S. citizens that means a valid passport, passport card, Enhanced Driver's License (issued by MI, MN, NY, VT or WA), or a Trusted Traveler card such as NEXUS. A standard driver's license or REAL ID is not accepted for the border crossing. Running across the border counts as crossing the border.

How do you register for the Detroit Free Press Marathon, and how much does it cost?

Registration is open entry (no lottery) through the official EnMotive platform until the field fills or September 8, 2026. Full-marathon pricing is tiered: about $120 early-bird, rising through roughly $140, $150, $160 and up to $170 as the race nears. The marathon has sold out the last two years (it filled by early March in 2025), so register early.

Is the Detroit Free Press Marathon course flat, and how much elevation is there?

It is rated mostly flat and fast — about +388 ft (118 m) of total climbing against roughly 397 ft of descent, so it is close to net-flat. The notable climbs are the one-mile ascent of the Ambassador Bridge early on and the half-mile rise out of the Detroit-Windsor Tunnel on the way back; the rest of the route through downtown Detroit is fast and gentle.

What is the 'Underwater Mile' at the Detroit Marathon?

After crossing the Ambassador Bridge into Windsor, Ontario around mile 3, runners return to Detroit through the Detroit-Windsor Tunnel, which runs beneath the Detroit River. That stretch is billed as the only official underwater international mile in the world — the 'Underwater Mile' — and is the most talked-about moment of the race. The tunnel closes to vehicles (roughly 6:15–10:30 a.m.) so runners can pass through.

Is the Detroit Free Press Marathon a Boston qualifier?

Yes. The course is USATF-certified and recognized by the B.A.A. for Boston qualifying. Its mostly-flat profile makes it a reasonable BQ option, though the bridge and tunnel climbs mean it is not a pure speed course. Check the time you need with our Boston Qualifying Calculator.

What is the time limit for the Detroit Free Press Marathon?

The full marathon has a 6-hour-30-minute course limit (about a 14:53 per-mile pace); the course reopens on that schedule and the finish line closes around 2:00 p.m. Because the international section depends on the bridge and tunnel reopening to traffic, runners need to keep ahead of the early-course cutoffs to complete the border crossing.

How big is the Detroit Free Press Marathon and where does it finish?

The full marathon draws around 3,500 finishers (3,569 in 2025), while the International Half, Motor City Half, relay and shorter races push the wider weekend well into the tens of thousands. The course starts and finishes downtown, with the finish line at Campus Martius, after touring Woodbridge, the District Detroit, Eastern Market and the Dequindre Cut.

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