Itämeri Maraton

Baltic Sea Marathon will be run and walked on Saturday, October 4, 2025. The distance options are the marathon, half marathon, and quarter marathon (10.5 km). The official time limit is six (6) hours for the full marathon and 5.5 hours for the half marathon and quarter marathon. The course is officially measured, and the start and finish area are at Keskuskoulu, Halmstadinkatu 2. Advance registration closes on Tuesday, September 30, 2025, at 24:00.