Black Mountains Marathon

Black Mountains Marathon 2027 Course Analysis

Black Mountains Marathon is a full marathon held in Crickhowell, United Kingdom. It is scheduled for Monday 14 June 2027. The course is run on trail surface with 861m of total climbing, with its high point near 1594m above sea level. For registration and full race details, visit the official Black Mountains Marathon website.

Elevation Profile

This is a very challenging course with 861m of total climbing - well above the average trail marathon - topping out around 1594m 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 June, the expected race day conditions are as follows. Moderate temperatures between 14°C and 18°C are expected. While comfortable for most runners, those targeting fast times should pay attention to hydration, as these temperatures can impact performance on race day. There is a high chance of rain (97%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.

Surface Type: Trail

Black Mountains 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 Black Mountains Marathon against other marathons to find the right race for your goals.