Dyfi X Trail Marathon

Dyfi X Trail Marathon 2025 Course Analysis

Dyfi X Trail Marathon is a full marathon held in Gwynedd, United Kingdom, scheduled for Saturday 19 April 2025. The course is run on trail surface with 1239m of total elevation gain, reaching a maximum altitude of 247m above sea level. For registration and full race details, visit the official Dyfi X Trail Marathon website.

Elevation Profile

This is a very challenging course with 1239m of total elevation gain — significantly more than the average trail marathon. The route ranges from 2m to 247m above sea level (245m range). Hill training is essential, and runners should expect a significantly slower time compared to a flat course.

Expected Race Day Weather

Based on historical weather data for April, the expected race day conditions are as follows. Cold conditions are expected, with temperatures between 6°C and 8°C. While cold weather reduces overheating risk, runners should dress in layers and be prepared for potential wind chill. There is a high chance of rain (95%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.

Surface Type: Trail

Dyfi X Trail 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.

How Difficult Is Dyfi X Trail Marathon?

Our difficulty rating for Dyfi X Trail 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 Dyfi X Trail Marathon against other marathons to find the right race for your goals.