
Gwynedd, United Kingdom · Monday 19 April 2027
Dyfi X Trail Marathon, set in the stunning Dyfi Valley of Wales, offers a challenging yet breathtakingly beautiful course. The race takes runners through rugged trails and scenic landscapes, providing breathtaking views of the surrounding mountains and valleys. With its focus on community and environmental sustainability, this event is perfect for trail running enthusiasts who enjoy a mix of athleticism and natural beauty.
Adjusted Time
5:28:51
Time difference: +88.8 minutes compared to a flat, road, temperate course.
On our difficulty model, Dyfi X Trail Marathon plays about 77 minutes slower than an average road marathon for a 3:30 runner. It ranks #23 hardest of 1150 marathons we analyse, and #6 of 57 in United Kingdom. Use the calculator above to see the exact adjusted time for your own goal pace.
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Dyfi X Trail Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:56:44 | +56:44 |
| 3:30:00 | 4:42:13 | +1:12:13 |
| 4:00:00 | 5:28:51 | +1:28:51 |
| 4:30:00 | 6:16:35 | +1:46:35 |
| 5:00:00 | 7:05:23 | +2:05:23 |
| 5:30:00 | 7:55:13 | +2:25:13 |
| 6:00:00 | 8:46:04 | +2:46:04 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Dyfi X Trail Marathon is a full marathon held in Gwynedd, United Kingdom. It is scheduled for Monday 19 April 2027. The course is run on trail surface with 1239m of total climbing, with its high point near 247m above sea level. For registration and full race details, visit the official Dyfi X Trail Marathon website.
This is a very challenging course with 1239m of total climbing - well above the average trail marathon - topping out around 247m above sea level. Hill training is essential, and you should expect a slower finish time than on a flat course.
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.
Dyfi X Trail 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 Dyfi X Trail Marathon against other marathons to find the right race for your goals.
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