Peak marathon season with crisp air, flat PR courses, and big-city experiences.

First race on deck: Heart of America Marathon (Sep 1)

Popular blocks that line up with Boston itself—mild temps and plenty of flat courses.

First race on deck: Ellerbe Marathon (Mar 1)

Chase high-mountain and coastal races with cooler starts despite summer calendars.

First race on deck: Casper Marathon (Jun 1)

Cooler temps across the South and desert Southwest for January–February breakthroughs.

First race on deck: Museum of Aviation Marathon (Jan 18)