Grandma's Marathon, held on June 21, 2025, in Duluth, Minnesota, is one of the most prestigious marathons in the U.S. The course takes runners along the scenic shores of Lake Superior, offering breathtaking views of the lake and surrounding landscape. With its fast and flat profile, this marathon is ideal for achieving personal bests and qualifying for the Boston Marathon.\n\nThe event features various distances, including a full marathon, half marathon, and shorter races, making it accessible t
Adjusted Time
4:02:48
Time difference: +2.8 minutes compared to a flat, road, temperate course.
| Surface | Road |
| Elevation Gain | 143m |
| Elevation High | 221m |
| Elevation Low | 183m |
| Predicted High | 24°C |
| Predicted Low | 14°C |
| Chance of Rain | 74% |