
Bursa, Turkey · Tuesday 6 October 2026
This race suits trail runners who have real hill work in their training and aren't intimidated by technical ground. The 256 metres of elevation gain across the full marathon might not sound like much on paper, but the course's range from 122 to 1863 metres above sea level tells a different story. You'll need the fitness to handle sustained climbing, not just a sprint finish. Trail experience matters here because you'll be moving over uneven surfaces, not asphalt, which demands more from your stabiliser muscles and concentration. This is for runners who actually enjoy the trail environment rather than those using it as a PR course, and for people prepared to show up with proper trail shoes. What you'll actually encounter is a moderately hilly trail that won't relent for forty-two kilometres. The terrain will force a realistic pace from the start, and the elevation profile means you can't treat this as a fast marathon. You're climbing and descending throughout the race in the Bursa region of Turkey, so expect rough ground, potential rocky sections, and limited flat recovery stretches. October weather in Turkey should be reasonable, but trail running always brings unpredictability. The real challenge isn't the total elevation gain in isolation but the fact that you're managing it over a full marathon distance on unstable ground. If you're running a trail marathon for the first time, this is a serious introduction, not a gentle one. Come prepared for technical footing, bring appropriate gear, and respect that trail marathons demand more problem-solving than their road equivalents.
Adjusted Time
3:50:30
Time difference: -9.5 minutes compared to a flat, road, temperate course.
On our difficulty model, 11th Eker I Run Marathon & 15K plays about 5 minutes faster than an average road marathon - a genuine PB course for a 3:30 runner. It ranks #1140 hardest of 1150 marathons we analyse, and #4 of 4 in Turkey. Use the calculator above to see the exact adjusted time for your own goal pace.
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On 11th Eker I Run Marathon & 15K | Difference |
|---|---|---|
| 3:00:00 | 2:50:41 | −09:19 |
| 3:30:00 | 3:20:23 | −09:37 |
| 4:00:00 | 3:50:30 | −09:30 |
| 4:30:00 | 4:20:58 | −09:02 |
| 5:00:00 | 4:51:43 | −08:17 |
| 5:30:00 | 5:22:45 | −07:15 |
| 6:00:00 | 5:54:02 | −05:58 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
11th Eker I Run Marathon & 15K is a full marathon held in Bursa, Turkey. It is scheduled for Tuesday 6 October 2026. The course is run on road surface with 256m of total climbing and around 1927m of descent (a net drop of roughly 1671m), with its high point near 1863m above sea level. For registration and full race details, visit the official 11th Eker I Run Marathon & 15K website.
This is a net-downhill course: it descends roughly 1671m more than it climbs (256m of ascent against about 1927m of descent), dropping from a high point near 1863m toward 122m above sea level. Point-to-point downhill courses like this are among the fastest available for a personal best or a Boston qualifier - just be aware that sustained descending fatigues the quads late in the race, so ease off early and do some downhill running in training.
11th Eker I Run Marathon & 15K is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare 11th Eker I Run Marathon & 15K against other marathons to find the right race for your goals.
If 11th Eker I Run Marathon & 15K fits your goal, these courses play out about the same on our difficulty model.