San Domenico 20M

MAR
29
2026
Choose between a 10 or 20 mile route along the scenic Taff Trail in Merthyr Tydfil. This traffic free race is ideal for marathon training and features chip timing and age category prizes.
Sun 29 Mar 2026
20 miles 10 miles

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Event Overview

The San Domenico 20/10 Miler is an organized road racing event held in Merthyr Tydfil, Wales. Organised by San Domenico RC, the event offers two distinct distances for participants:

  • 10 miles
  • 20 miles

The race serves as a preparation event for spring marathons and half marathons. Both distances start and finish at the Merthyr Leisure Village. The course follows a scenic out and back route along the Taff Trail, heading south through Abercanaid, Troedyrhiw, and Aberfan. The terrain is primarily off-road and traffic-free, though the path remains a shared route with walkers and cyclists. The 10 mile race consists of one loop, while the 20 mile race requires two loops of the course.

Participant Information

The 20 mile race has a strict time limit of 4 hours and 30 minutes. A course closure is implemented at the 10 mile mark at 2 hours and 15 minutes. For safety and communication with marshals, the use of headphones is not permitted.

Registration includes a running number with a timing chip for collection on the day, plus a race memento and chip-timed results. The route is fully marshalled and features water stations, with nine stations for the 20 mile distance and four for the 10 mile distance.

The venue at Merthyr Leisure Village provides on-site parking, toilet facilities, and refreshments. Entry is limited to 150 runners for the 10 mile race and 250 runners for the 20 mile race. Prizes are awarded across all age categories. Visit the organization's website for the most recent information.

20 mi
20 Miler
10 mi
10 Miler