Fall Equinox 2025 Marathon. The fall equinox is on sunday september 22, 2025 to saturday october 5, 2025. By don kiely | may 8, 2025 | news | 0 comments.
Go here to get all the info you need. 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.