Ston Wall Marathon
Ston, Croatia · Sunday 21 September 2025
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
4:58:48
Time difference: +58.8 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain802m
Elevation High129m
Elevation Low-2m
Ston Wall Marathon 2025 Course Analysis
Ston Wall Marathon is a full marathon held in Ston, Croatia, scheduled for Sunday 21 September 2025. The course is run on trail surface with 802m of total elevation gain, reaching a maximum altitude of 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 elevation gain — significantly more than the average trail marathon. The route ranges from -2m to 129m above sea level (131m range). Hill training is essential, and runners should expect a significantly slower time compared to a flat course.
Surface Type: Trail
Ston Wall Marathon is a trail race, meaning the course includes unpaved surfaces such as dirt, gravel, or forest paths. Trail surfaces are inherently slower than road courses due to uneven footing, technical sections, and often steeper gradients. Trail-specific shoes with good grip are recommended, and runners should expect a finish time 10-20% slower than their equivalent road marathon time.
How Difficult Is Ston Wall Marathon?
Our difficulty rating for Ston Wall Marathon is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
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.