Race guides / Flat and fast

The flattest marathons in North America.

Flat marathons in the United States, Canada and Mexico, ranked by total climb. Plenty of them are Boston-qualifying courses, so if you are chasing a qualifying time, start here and check the course certification on each race page. 18 flat marathons in 2 countries, racing from 7 Nov 2026 to 10 Oct 2027. The flattest, Miami Marathon, climbs 38 m in total.