Formentera Trail 21.1

Formentera Trail 21.1 2026 Course Analysis

Formentera Trail 21.1 is a full marathon held in El Pilar de la Mola, Spain, scheduled for Saturday 6 June 2026. The course is run on trail surface with 380m of total elevation gain, reaching a maximum altitude of 184m above sea level. For registration and full race details, visit the official Formentera Trail 21.1 website.

Elevation Profile

This is a hilly course with 380m of total elevation gain. The route climbs from 9m to as high as 184m above sea level — a substantial 175m elevation range. Runners should train on hills and plan for a more conservative pacing strategy, especially on the climbs.

Expected Race Day Weather

Based on historical weather data for June, the expected race day conditions are as follows. Hot conditions are expected, with temperatures between 21°C and 23°C. Heat is one of the biggest performance factors in marathon running — research shows that for every degree above 15°C, marathon times slow by approximately 1-2%. Extra hydration and a conservative start are strongly recommended. There is a low chance of rain (0%), so dry conditions are likely.

Surface Type: Trail

Formentera Trail 21.1 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 Formentera Trail 21.1?

Our difficulty rating for Formentera Trail 21.1 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 Formentera Trail 21.1 against other marathons to find the right race for your goals.