The 2026 Detroit Free Press Marathon has once again captured the attention of runners across the nation, selling out in just six days after registration opened. The marathon, known for its international course and rich history, has seen interest skyrocket in recent years, making this 2026 sellout one of the fastest in the event’s nearly five-decade history.
Race organizers confirmed the sellout on social media late Wednesday evening, sending a clear message: demand for Detroit’s premier fall marathon experience has never been stronger. With spots gone almost as quickly as they were released, runners and spectators alike are already looking ahead to what promises to be another unforgettable weekend in Motor City.
“The sellouts arrived even earlier than we could have imagined,” Aaron Velthoven, director of Detroit Free Press Marathon, said.
Explosive Growth and Fan Frenzy
What once was a modest local race has grown into a high-demand international event drawing tens of thousands of participants year after year. The Detroit Free Press Marathon and its associated events, including the International Half Marathon and several shorter races, have become a staple on the global running calendar.
The 2024 race made history by selling out about three months ahead of the event for the first time, marking a shift in interest that organizers have since capitalized on. Last year, the races reached capacity even earlier, in March, and this year’s sell-out in just six days sets a new pace entirely.
The marathon’s unique charm helps explain the excitement: runners leave the United States, cross the Ambassador Bridge into Windsor, Ontario, and return via the Detroit-Windsor Tunnel, featuring the only official underwater mile on a marathon course–a quirky and iconic feature that’s thrilled participants for decades.
According to the Detroit Free Press, “the 2025 marathon drew around 26,000 registrants across the entire race weekend, setting the race record, while the 2026 race is expected to attract around 30,000 registrants.”
Though the increase of participants is exciting, Velthoven said it is not the goal to be the biggest marathon. The goal is to be the best.
This is the marathon’s third year in a row selling out.
What’s Sold Out – and What’s Not
While the full marathon slots were snapped up nearly instantly, not everything associated with race weekend has reached capacity yet. Ancillary events such as the Motor City Half-Marathon, 5K, and kids races still show availability for now, offering alternatives for runners and families who missed out on the main marathon entry.
The International Half Marathon, which also crosses into Canada, has likewise sold out according to official race listings–reinforcing how widespread interest has become across multiple distances for race weekend.
“The increased interest is just more proof that the marathon has become a signature event on Detroit’s sporting calendar, and a can’t-miss event for the global running community, which comes to our region to run a one-of-a-kind international race,” Velthoven said.
Race officials have announced that a waitlist will open January 14 at 12 p.m. EST for both the marathon and the half marathon, allowing hopeful runners to secure a spot if openings occur due to deferrals, transfers, or cancellations. Participants will be charged $5 (that will go towards the registration fees if a spot opens up), and will be processed in order as spaces become available, with some events of race weekend allowing changes or transfers through early fall.
According to the marathon’s Instagram page, “deferrals open March 1 and transfers open April 1.”
A Weekend Festival of Running
The Detroit Free Press Marathon isn’t just a single race; it’s a full running festival spanning an entire weekend October 16-18. Activities kick off with a Health & Fitness Expo that draws exhibitors, athletes, and fitness enthusiasts from around the Great Lakes region.
Runners can also take part in a marathon relay, motor city half, 5K, kids marathon, and other fun runs designed to make the event family-friendly and inclusive, welcoming runners of all ages and abilities.
This multi-distance structure has greatly expanded the event’s appeal, encouraging first-timers and seasoned marathoners alike to experience Detroit’s vibrant neighborhoods and international course, while also offering activities that bring the entire community together.
“Word is getting out about Detroit,” Velthoven said.
“It’s really important for us to have a tremendous running experience for our participants. We go to great lengths to ensure that all runners get that support, and part of that is ensuring that we do not overcrowd the participants that are running 26.2 miles or 13.1 miles on our course.”
2026 Detroit Free Press Marathon Reaches Capacity in Record Time