Marathons with the hardest finish
A hill at 8 km is an inconvenience. The same hill at 35 km is a different race entirely, because by then you are running on a depleted tank and the effort cost of a climb compounds with fatigue rather than adding to it. These are the courses whose hardest grade-adjusted kilometre falls after the 30 km mark, ranked by how much extra effort that stretch demands over flat ground.
The ranking
| # | Course | Location | Measure |
|---|---|---|---|
| 1 | Athens Marathon | Athens | hardest at km 30 (mile 18.5) — 18% over flat effort |
| 2 | Mexico City Marathon | Mexico City | hardest at km 31 (mile 19.5) — 16% over flat effort |
| 3 | New York City Marathon | New York, NY | hardest at km 37 (mile 23) — 12% over flat effort |
| 4 | Berlin Marathon | Berlin | hardest at km 38 (mile 23.5) — 11% over flat effort |
| 5 | Paris Marathon | Paris | hardest at km 39 (mile 24) — 11% over flat effort |
| 6 | Rome Marathon | Rome | hardest at km 30 (mile 18.5) — 11% over flat effort |
| 7 | Tokyo Marathon | Tokyo | hardest at km 33 (mile 20.5) — 11% over flat effort |
| 8 | Boston Marathon | Boston, MA | hardest at km 33 (mile 20.5) — 9% over flat effort |
| 9 | Grandma's Marathon | Duluth, MN | hardest at km 35 (mile 21.5) — 8% over flat effort |
| 10 | Toronto Marathon | Toronto, ON | hardest at km 32 (mile 20) — 4% over flat effort |
| 11 | Amsterdam Marathon | Amsterdam | hardest at km 33 (mile 20.5) — 4% over flat effort |
| 12 | Chevron Houston Marathon | Houston, TX | hardest at km 37 (mile 23) — 4% over flat effort |
Frequently asked questions
Marathons with the hardest finish: which is number one?
Athens Marathon — hardest at km 30 (mile 18.5) — 18% over flat effort. The full ranking covers 12 courses and is computed from each course's own elevation profile rather than from race organiser claims.
How are these rankings calculated?
From the elevation profile of each course, built from GPX traces and digital elevation models, clipped to the official 42.195 km. Elevation figures carry roughly ±5–10 m of DEM noise, so small differences between flat courses are measurement error rather than a meaningful gap.
Other course rankings
- The Flattest Marathon Courses — Courses ranked by total elevation gain, least first.
- The Hilliest Marathon Courses — Courses ranked by total elevation gain, most first.
- Net-Downhill Marathon Courses — Courses ranked by net elevation change, biggest drop first.
- World Marathon Majors: Course Profiles Compared — Every Major course, ranked flattest to hilliest.
- The Biggest Marathons by Field Size — Courses ranked by the number of runners on the start line.