Three Forts Marathon

Three Forts Marathon 2027 Course Analysis

Three Forts Marathon is a full marathon held in Worthing, United Kingdom. It is scheduled for Tuesday 4 May 2027. The course is run on trail surface with 1949m of total climbing, with its high point near 235m above sea level. For registration and full race details, visit the official Three Forts Marathon website.

Elevation Profile

This is a very challenging course with 1949m of total climbing - well above the average trail marathon - topping out around 235m 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 May, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 7°C to 14°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a low chance of rain (0%), so dry conditions are likely.

Surface Type: Trail

Three Forts Marathon is a trail race, meaning the course includes unpaved surfaces such as dirt, gravel, or forest paths. Trail surfaces are usually slower than the road equivalent - often by 10-20% - because of uneven footing, technical sections, and frequently steeper gradients, though a smooth, non-technical or downhill trail can run faster than that suggests. Trail-specific shoes with good grip are recommended.

Looking for an easier marathon or a tougher challenge? You can also compare Three Forts Marathon against other marathons to find the right race for your goals.