Ston Wall Marathon
Ston, Croatia · Tuesday 21 September 2027
On September 21, 2025, you'll run 42.2 kilometers through Ston, Croatia on a hilly trail course that climbs 802 meters over varied terrain. The route follows the historic Ston Wall with elevation changes ranging from near sea level to 129 meters, making this a proper climbing day that demands respect for the terrain and decent downhill management. This is a trail marathon, not a road race, so expect uneven surfaces and the kind of footing that requires focus, especially in the later miles when fatigue sets in. Registration is open now, and the race is part of the Zero Waste Blue project, meaning the organizers are serious about minimizing environmental impact. Check the FAQ section on their website for specifics about start times, course measurement verification, and registration confirmation details, since the website indicates these are common questions from runners.
Difficulty Calculator
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:m
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Adjusted Time
4:49:43
Time difference: +49.7 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain802m
Elevation High129m
Elevation Low-2m
Weather Forecast
High29°C
Low21°C
Chance of Rain5%
How hard is Ston Wall Marathon?
Very Difficultharder than 92% of marathons
Flattest / easiestHardest
On our difficulty model, Ston Wall Marathon plays about 43 minutes slower than an average road marathon for a 3:30 runner. It ranks #94 hardest of 1151 marathons we analyse, and #1 of 2 in Croatia. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Ston Wall Marathon?
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 Ston Wall Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:26:28 | +26:28 |
| 3:30:00 | 4:07:31 | +37:31 |
| 4:00:00 | 4:49:43 | +49:43 |
| 4:30:00 | 5:33:00 | +1:03:00 |
| 5:00:00 | 6:17:15 | +1:17:15 |
| 5:30:00 | 7:02:27 | +1:32:27 |
| 6:00:00 | 7:48:33 | +1:48:33 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Ston Wall Marathon 2027 Course Analysis
Ston Wall Marathon is a full marathon held in Ston, Croatia. It is scheduled for Tuesday 21 September 2027. The course is run on road surface with 802m of total climbing, with its high point near 129m above sea level. For registration and full race details, visit the official Ston Wall Marathon website.
Elevation Profile
This is a very challenging course with 802m of total climbing - well above the average road marathon - topping out around 129m above sea level. Hill training is essential, and you should expect a slower finish time than on a flat course.
Expected Race Day Weather
Based on historical weather data for September, the expected race day conditions are as follows. Hot conditions are expected, with temperatures between 21°C and 29°C. Heat is one of the biggest performance factors in distance running - for every degree above 15°C, finish times can slow by roughly 1-2%. Extra hydration and a conservative start are strongly recommended. There is a low chance of rain (5%), so dry conditions are likely.
Surface Type: Road
Ston Wall Marathon 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 Ston Wall Marathon against other marathons to find the right race for your goals.
Marathons of similar difficulty
If Ston Wall Marathon fits your goal, these courses play out about the same on our difficulty model.