Bwlah Penbarras, United Kingdom · Sunday 11 May 2025
Immerse yourself in the legends of King Arthur at the Excalibur Marathon (featuring a half marathon option), held in southwest England. The course explores the rolling hills and wooded areas of Somerset, offering glimpses of ancient history and breathtaking views. The landscape is quintessentially English and promises a memory. Runners seeking a unique and challenging race experience will find a touch of magic in this Excalibur journey.
Adjusted Time
2:00:22
Time difference: +15.4 minutes compared to a flat, road, temperate course.
Excalibur Half Marathon is a half marathon held in Bwlah Penbarras, United Kingdom, scheduled for Sunday 11 May 2025. The course is run on road surface with 969m of total elevation gain, reaching a maximum altitude of 539m above sea level. For registration and full race details, visit the official Excalibur Half Marathon website.
This is a very challenging course with 969m of total elevation gain — significantly more than the average road marathon. The route ranges from 350m to 539m above sea level (189m range). Hill training is essential, and runners should expect a significantly slower time compared to a flat course.
Based on historical weather data for May, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 9°C to 20°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.
Excalibur 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.
Our difficulty rating for Excalibur 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 Excalibur Half Marathon against other half marathons to find the right race for your goals.
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