Half Marathon races near Jacksonville

Jax Base Miles By The Water

Jacksonville hosts 3 Half Marathon races in 2026 within 80 km of the city centre — upcoming dates, recurring series, and other races nearby, all in one place.

Jacksonville runners get a coastal mix without making a big production of it. You can run 5 miles out-and-back, hit the S-Line Urban Greenway for a 5K trail, and use the Jacksonville-Baldwin Rail Trail when base miles need room. The Two Bridges Run loop goes over the Main Street Bridge and comes back across the Acosta Bridge. 1st Place Sports Running Club, Jacksonville Track Club, Jacksonville Run Club, Neptune Run Crew, JTC Running, PRS Running Club, and Florida Striders keep the calendar moving. Gate River Run, Ameris Bank Jacksonville Marathon, Tour de Pain, and Guana River 50 km Trail Run are the anchor events.

Jacksonville riders get river spin, beach roll, rail-trail tempo, and dirt days without leaving the metro orbit. The nearest climb is 4 km when locals want the closest thing to climbing. The nearest climb is 3 km with 182 m elevation. Hanna Park has 14 miles of mountain bike trails, and Carey State Forest, Guana River Marsh, and Nocatee Trails handle gravel and singletrack moods. North Florida Bicycle Club, Major Taylor Cycling Club of North Florida, and VeloBrew Bicycle Club carry the group-ride side. River City Summer Slam sits as the anchor race.

November through April gives Jax the cleanest training block, with drier days and enough mild air for Z2, intervals, long runs, and steady rides. Summer changes the game from May through September because hot humid mornings are normal and brief but intense downpours with thunder and lightning can rewrite a plan fast. Locals start early, keep the effort honest, and use the beach, Riverwalk, Baldwin Trail, or shaded park trails when the legs need consistency. The city usually sees only about 10 to 15 short-lived nights at or below freezing.