Ameris Bank Jacksonville Marathon, Half Marathon & 5K

Ameris Bank Jacksonville Marathon, Half Marathon & 5K is held in Jacksonville, Florida, on December 12, 2026. The marathon (26.2 miles), the half marathon (13.1 miles) and the 5K all start at 7 a.m., so the three fields are out on course together from the first mile.

These are road distances, and a mid-December marathon fits neatly for anyone who missed a fall race or wants a second attempt at a qualifying time in the same season. Plan on sixteen weeks with a weekly long run climbing past 18 miles, plus regular running at goal marathon pace so the number means something on the day. The half suits a twelve-week build on the same pattern, and the 5K works either as a hard opener to the winter or as a way to race something while a partner takes on 26.2. A single 7 a.m. start keeps the morning simple: one bag drop, one warm-up, one finish area for everybody.