Fall Equinox 2024 Marathon. The fall equinox marathon, taking place on september 22, 2024, in fort collins, co, features a scenic and challenging course through the buckhorn and poudre river. (relay information coming soon, probably early summer 2024.).
Prepare for the first 5 hilly miles of. Held on the autumnal equinox during the height of fall color, the fall equinox marathon race features the beautiful scenery of colorado as participants run downhill on.