The scenic 20 Miler and 10 Miler races set on the Taff Trail in the heart of the Welsh Valleys - Race HQ is Rhydycar Leisure Centre, Merthyr Tydfil, CF48 1UT

 2023 entries open 6PM Friday 11th November 2022, here:


2022 Results here:

All photos here:


San Domenico will continue to follow UK Athletics and UK Government advice concerning COVID-19 (Coronavirus).

Race overview

  • Scenic, accurately measured and certified 20 Mile and 10 Mile race routes, Welsh/UK Athletics Race license applied for
  • Category Prizes / First Aid Provision & Water stations
  • Race numbers are to be collected on the day / No entry fees can be refunded or deferred, even if the race is cancelled or re-scheduled
  • Unfortunately the course is not suitable for wheelchair athletes 
  • Headphones / Personal Stereos are not to be worn at this race as marshal's instructions must be obeyed at all times, people contravening this rule will face disqualification
  • Note that there is no baggage storage available

Start Times / Cut-off Times

20 Miler - 09:30AM start
10 Miler - 09:30AM start
IMPORTANT NOTE: For the 20 miler there is a 4 hours 30 minutes cut-off time, at 10 miles we will operate a 2 hours 15 minutes course closure.

Entry Limit

20 Miler - 200
10 Miler - 200
Entries close: when race is full or 6PM Friday 10th March 2023, whichever is the sooner.
Entries on day: will be advised when pre-entries close

Entry Cost

20 Miler
Affiliated: £20.00
Un-affiliated: £22.00
10 Miler
Affiliated: £12.00
Un-affiliated: £14.00

Race Route and map

Using the improved, faster 2019 / 2020 course consisting of two laps for the 20 Miler. One lap for the 10 Miler. 
Certified, accurate course - No. 18/123 and 18/122
Elevation - approx. 600ft climb / 600ft drop (20 Miler) - 300ft climb / 300ft drop (10 Miler)

Race memento

20 Miler: T-shirt
10 Miler: Race memento - buff

Pre-race safety briefing information

You are responsible for being suitably fit and healthy to complete this event. Although all of the course is on a tarmac path or road, we do not have exclusive use of it so please observe the normal rules of traffic and obey any instructions given by the marshals. There are a number of anti-vehicle bollards in the centre of the path, please take care when passing these. If possible warn other runners of their presence. Unless otherwise directed by a marshal stay on the left hand side of the route. If you injure yourself or see anyone hurt please inform the nearest marshal. There will be first aid cover during the event. There are several access points where spectators can watch the race, please observe any instructions given by a marshal at these points.

Are you fit to run?

It is the participants responsibility to ensure that they are physically fit to run and have adequately prepared themselves

Water stations

Several water /aid stations are planned to be on the course and one at the finish. The water will be in bottles not cups. Gels (20 Miler entrants only) will also be available at some of the water stations.

Due to the 2-lap course there are three water stations which you pass multiple times:

Water stations – distance in miles:

1  /  5.7  /  7.72 (gels)  /  10  /  11  /  13.28 (gels)  /  15.3  /  15.7  /  17.72 (gels)  /  Finish


Prize presentations and results

Prizes will be presented to the winners shortly after they cross the finish line.
Results will be emailed to all competitors and also posted on the San Domenico website as soon as possible after the race:




Race categories, team competitions and course records

Race categories - subject to number of entrants in each category.
Female - 1st, 2nd, 3rd.
1st in each of the following age categories - FV35, FV45, FV55, FV65+.
20 Miler only - Team prize - First 3 runners to count - based on accumulative time.

Male - 1st, 2nd, 3rd.
1st in each of the following age categories - MV35, MV45, MV55, MV65+.
20 Miler only - Team prize - First 3 runners to count - based on accumulative time.


Course records - 20 Miler

Athlete Club Time
Holly Rush Avon Valley Runners
02:08:10 (2022)
Female V35-44 Holly Rush Avon Valley Runners 02:08:10 (2022)
Female V45-54 Chris Webb Swansea Harriers 02:36:06 (2020)
Female V55-64 Jane Ogilvie
Brackla Harriers
02:43:49 (2020)
Female V65+ Brenda Evans Pontypridd Roadents AC
03:32:58 (2019)
Male Dan Bodman
Pontypridd Roadents AC 01:52:24 (2020)
Male V35-44 Jamie Vanstone
Pontypridd Roadents AC 01:57:24 (2020)
Male V45-54 Robin Phillips
Westbury Harriers
02:09:38 (2020)
Male V55-64 Anthony Ballance
Westbury Harriers
02:15:06 (2020)
Male V65+ Terry O'Brien Unaffiliated 02:33:46 (2022)

Course records - 10 Miler

Category Athlete Club Time
Senior Female Olivia Tsim Pontypridd Roadents AC 00:57:57  (2022)
Female V35-44 Liz May Pontypridd Roadents AC 01:10:43 (2022)
Female V45-54 Helen-Marie Davies Swansea Harriers AC 01:06:53 (2022)
Female V55-64 Nikki Morgan   01:06:45 (2022)
Female V65+ Rose Thomas Rhayader AC 01:32:31 (2020)
Senior Male Joseph Reardon Aberdare Valley AAC 00:55:00 (2020)
Male V35-44 Simon Lewis Pontypridd Roadents AC 00:53:48 (2020)
Male V45-54 Matthew Jacklin Aberdare Valley AAC 00:57:15 (2022)
Male V55-64 Haydn Hartnell Parc Bryn Bach RC 01:07:47 (2019)
Male V65+ No record set    


Photos - © 2018, 2019, 2020 Johnny Lam.