Regensburg, Bavaria (Germany) - "Regensburg Marathon". The runners of the marathon, three-quarter marathon and half marathon run together in the first round of the half marathon route. Three-quarter marathon and marathon then run one or two quarter marathon rounds (Old Town Rounds). The runners of the quarter-marathon start run at the Ostentor (eastern old town) back to the Infineon parking lot. Start marathon, three-quarter and half marathon at 08.30. Quarter marathon starts at 11.30. www.regensburg-marathon.de