Amsterdam Marathon

A flat October course that starts and finishes inside the historic Olympic Stadium, running out along the Amstel River past mansions and windmills. Nothing on the route asks for real climbing, which makes even pacing straightforward. The 2027 race is on October 31. It is a big race, with two start areas of 16,000 runners each, and that breadth shows in the results: its share of sub-three-hour finishers sits well below Valencia's and Seville's, because the field is less stacked with quick club runners rather than because the course is slow. The risk to plan for is wind on the open stretch along the Amstel, where the 2026 leaders ran into a headwind; it is more of a concern here than heat.