
Puerto Natales, Chile · Saturday 9 September 2023
This race suits experienced trail runners who are comfortable with sustained climbing and technical terrain. You need solid leg strength and the mental fortitude to keep pushing through a hilly course, especially in the latter stages when fatigue compounds the gradient. Trail running experience matters here because while the elevation gain of nearly 1000 metres isn't extreme for a full marathon, the concentration required to move safely over uneven ground adds another layer of difficulty beyond what road runners might expect. It's also a good test for runners who enjoy racing in remote, less-manicured environments and who don't mind some uncertainty about exact conditions. The Patagonian setting means weather can be unpredictable, so adaptability is part of the challenge. On the course itself, expect significant rolling climbs and descents throughout the 42 kilometres rather than one or two big efforts. The terrain rises and falls between roughly 25 metres and 350 metres above sea level, which means constant micro-adjustments to your pace and effort. Trail conditions in September, early spring in the Southern Hemisphere, could be muddy, rocky, or firm depending on recent weather. The major challenge isn't necessarily any single brutal climb but the accumulated toll of miles on technical ground, where your quads take a beating on the downs and your cardiovascular system stays elevated on the ups. The remote location means limited aid opportunities compared to road marathons, so self-sufficiency and careful pacing become critical. If you're expecting a fast time, this isn't the race for it. What it offers instead is a proper mountain marathon experience in one of the world's most dramatic landscapes.
Adjusted Time
5:08:49
Time difference: +68.8 minutes compared to a flat, road, temperate course.
Patagonian International Marathon is a full marathon held in Puerto Natales, Chile, scheduled for Saturday 9 September 2023. The course is run on trail surface with 990m of total elevation gain, reaching a maximum altitude of 352m above sea level. For registration and full race details, visit the official Patagonian International Marathon website.
This is a very challenging course with 990m of total elevation gain — significantly more than the average trail marathon. The route ranges from 24m to 352m above sea level (328m range). Hill training is essential, and runners should expect a significantly slower time compared to a flat course.
Patagonian International 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.
Our difficulty rating for Patagonian International 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 Patagonian International Marathon against other marathons to find the right race for your goals.