Sunday, October 17, 2021 at 7:00 AM

Registration is now open – learn more about registration here.

On-site registration at our Health & Fitness Expo will not be available for this event.

Age Restriction

All participants of the International Half-Marathon must be 14 years of age or older to participate.

The Course and Time Requirements

The International Half-Marathon course offers international appeal, traversing both downtown Detroit and Windsor, Ontario, crossing the border at both the Ambassador Bridge and Detroit-Windsor Tunnel.

With a wave start, smaller groups of participants are sent off at two-minute intervals beginning at 7:00 AM, which eases congestion in those early miles. Groups are based on the projected pace indicated on the registration form, so an accurate response is necessary.

You can view all of our course maps here.

A “Last Chance Pacer” will be provided for your events. These pacers will travel at the average pace needed to cross the finish line at four hours. Your progress will be monitored throughout the race. If you fall significantly behind the “Last Chance Pacer”, you will be given fair warning to pick up the pace. If you can’t keep pace, you will be required to board a bus following the pacers to be transported back to the start-finish area.  We will close the half marathon course at 11:30 AM. Participants have 4 hours to complete the race.

We are fortunate to offer two international border crossings during the course of our event. To continue providing this unique opportunity, we MUST re-open the Detroit-Windsor Tunnel to vehicular traffic at 10:00 AM. To ensure your safety and to meet all time limits, we have established the following milestones:


Milestone  Mile Marker  Kilometer Marker  Time of Day You Must Pass The Milestone
Start (W Fort St, west of Cass Ave) 0.0 0.0 7:26 AM
Bridge Entrance (at E Grand Blvd) 1.9 3.1 8:01 AM
Bridge Exit (at Huron Church Rd) 4.2 6.8 8:42 AM
Tunnel Entrance (at Park St E) 6.9 11.1 9:32 AM
Tunnel Exit (at W Jefferson Ave) 8.2 13.1 9:55 AM
Mexican Town (W 18th St & Bagley Ave) 10.8 17.4 10:43 AM
End of Corktown (Brooklyn St & Michigan Ave) 12.0 19.3 11:06 AM
Finish (W Fort St, west of Cass Ave) 13.1 21.1 11:26 AM

NOTE: If at any time you fall behind these milestone times, you may be required to board a bus to be transported back to the start-finish area.

Pace Teams:

Want to run with a group? Hope to finish within a certain time?

If you answered “yes” to any of these questions, consider signing up for our Pace Team service at the Health & Fitness Expo. Read more information about Pace Teams.

International Requirements

The International Half-Marathon division is an international event crossing U.S. and Canadian borders twice. It is a privilege and an honor to use the Ambassador Bridge and the Detroit-Windsor Tunnel. Do not drop articles of clothing, water bottles, tissue or paper cups as you run across these prestigious landmarks. For all requirements and restrictions click here.


Prizing below is for International Half-Marathon Runners. All individual cash prizes are based on “clock time” (not chip time). We invite walkers to participate in this event, however no prizes will be awarded specifically for walkers.

Place Open Male/Female Masters Male/Female
1st $2,000 $1000
2nd $1,000 $500
3rd $500 $250

NOTE: In the event that a Masters runner also places in the Overall division, they will receive both the Masters and the Overall cash awards.