Three Forts Half Marathon

Three Forts Half Marathon 2025 Course Analysis

Three Forts Half Marathon is a half marathon held in Worthing, United Kingdom, scheduled for Sunday 4 May 2025. The course is run on road surface with 497m of total elevation gain, reaching a maximum altitude of 230m above sea level. For registration and full race details, visit the official Three Forts Half Marathon website.

Elevation Profile

This is a hilly course with 497m of total elevation gain. The route climbs from 21m to as high as 230m above sea level — a substantial 209m 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 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: Road

Three Forts Half Marathon is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.

How Difficult Is Three Forts Half Marathon?

Our difficulty rating for Three Forts Half 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 half 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 Three Forts Half Marathon against other half marathons to find the right race for your goals.