This map is a reference for camera locations; the official route map takes precedence. The route follows the landmarks named in the official race guide, traced along real roads with the OSRM routing tool (OpenStreetMap road network); it is not an official survey, and turnaround coordinates are approximate. Measured lengths for both the half and full marathon are slightly above the official distances (29K / 42.195K), probably because the road network runs longer than the actual course.