Garmin Marathon

Registration is open to anyone online until April 24, 2026 at 5 PM, or until the race fills. No lottery or qualifying standard is required. Note that no refunds or deferrals are offered, so register when you're confident in your training.

Yes, the course is USATF certified and qualifies as a Boston qualifier. You'll need to meet the BAA's age-group standard for your finish time to count toward registration at Boston.

The course is point-to-point with a net elevation change of zero, but that doesn't mean it's flat. There's close to 900 feet of cumulative gain spread across rolling terrain, so expect a hilly but manageable route rather than a flat PR course.

The time limit is 6.5 hours from the start.

Recent editions have seen around 3,000 finishers, making it a mid-size race with a well-organized feel and enough runners to keep the energy up without overcrowding the course.

Both the start and finish are at Garmin World Headquarters in Olathe, Kansas. Olathe is about 20 minutes southwest of downtown Kansas City and roughly 30 miles from Kansas City International Airport.

Late April in Olathe typically brings cool mornings in the low 40s and afternoon highs around 60 degrees. It's generally good running weather, though wind on the suburban course can be a factor worth watching as race day approaches.