20 Miler start

9:30AM, Sunday 18th March 2018


20 Mile race and pre-marathon training run

 Rhydycar Leisure Centre, Merthyr Tydfil, South Wales, CF48 1UT


2018 race info and online entry coming soon...

all race information to be updated for 2018 race.

Brief course description

The start is 300m South of the Leisure Centre on the Taff Trail path which is located to the rear of the Leisure Centre.

Head North for 2 x 1 mile loops.

Head South down Taff Trail.

At 8 Miles you will go up Cefn Glas mountain road – sorry about that!

Big downhill to Quakers Yard, then the picturesque Trevethick Trail to the dogleg turn at 12.7 miles.

Back to the Pontygwaith Bridge and rejoin the Taff Trail, returning to the finish which is located at the rear of the leisure centre - Gantry.

  • Mile marker signs put out this morning
  • ‘yellow dots’ to show the route at some junctions
  • marshals in place at main junctions / road junctions
    • The course is not traffic free, vehicles have priority
    • Obey any instructions given by the police or marshals
    • There are a number of ‘anti-vehicle’ bollards in the centre of the trail, please take care when passing these. If possible warn other runners of their presence by shouting 'BOLLARDS!'

Water stations

There are six water stations on the course and one at the finish. 

WS1 - 3.4 miles - water

WS2 - 6.5 miles - water

WS3 - 9.9 miles - water

WS4 - 13 miles - water and gels

WS5 - 15.6 miles - water and gels

WS6 - 18.8 miles - water

FINISH – water


Which side of the path should you run on – RIGHT

Which side of the road at 8 miles to 11 miles - LEFT

If you injure yourself or see anyone hurt please inform the nearest marshal who will summon first aid cover.

We hope you enjoy the event.


Need to contact us?
Only contact us after you have read all of this page. Please use the contact page on the website - here

Race overview

A scenic, accurately measured 20 Mile road race route, mainly along the Taff Trail
Course measurement certificate - 15/098
Start, Finish & Race HQ at Rhydycar Leisure Centre (CF48 1UT)
Excellent training race or long run for Spring Marathons - London in particular
Category Prizes, Changing & Showers / Baggage area.
First Aid Provision - Water / Electrolyte / Gel stations
Chip timing
Unfortunately the course is not suitable for wheelchair athletes
Run under Welsh Athletics rules - race permit SOUTH R.A.C.RR-16
Race numbers and timing chips are to be collected on the day
No entry fees can be refunded or deferred, even if the race is cancelled or re-scheduled
Closing date for postal entries is Saturday 12th March 2016. Please make cheques payable to San Domenico RC
Race HQ is located in the main hall of Rhydycar Leisure Centre (CF48 1UT)
Toilets, changing & showers
Baggage storage (at the competitors own risk)

The course
The race heads North towards Merthyr College to do two short loops (keep right), then turns and heads down the Taff Trail to Pontygwaith for a loop around Quakers Yard and a dog-leg up the Trevithick Trail (keep right on the dog-leg as there will be oncoming runners). You return to the finish at Race HQ on the same section of Taff Trail as the outward leg but in reverse. It is predominantly a tarmacadam surface with one picturesque section on the Trevithick trail being an unsurfaced, mostly compacted path.


Entry costs
Affiliated (inc. RunBritain members): £18 in advance.
Unaffiliated: £20 in advance.
Entry on day will be £25.
Race limit is 400 runners
Minimum age is 18 years of age on race day.

Start time, race numbers and chip timing
There are 2 start times - at 9:30AM the 4 hours plus wave will start, followed at 10AM by the main wave start. We have done this split start previously and it was well received by those in the 4 hour plus wave.

Your race number is to be attached to the front of your vest/shirt using 4 safety pins, it incorporates your timing chip device, DO NOT put safety pins through the chip timing strips. Please write your emergency contact and any medical details on the rear of the race number in the section provided.

Pre-race safety briefing information

9:30AM wave - briefing at 09:25AM

10AM wave - briefing at 09:55AM

You are responsible for being suitably fit and healthy to complete this event. Although the majority of the course is on the Taff Trail, 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 right 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 on the Taff Trail 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
Six water stations are planned to be on the course and one at the finish.

WS1 - 3.4 miles - water
WS2 - 6.5 miles - water
WS3 - 9.9 miles - water
WS4 - 13 miles - water and gels
WS5 - 15.6 miles - water and gels
WS6 - 18.8 miles - water
FINISH - water

Headphone, earphones, ear-buds and similar equipment
Along with many other race organisers we have endeavoured to persuade runners not to wear headphones, earphones or similar equipment during races. These efforts have failed and consequently we have no alternative but to adopt a strict disqualification practice for any runner seen wearing headphones, earphones or similar equipment. In respect of this race it is important that runners can hear the verbal warnings and instructions issued by race marshals.

Race memento - technical wicking event t-shirt

  • We guarantee t-shirts for all pre-entries.
  • We guarantee the correct size t-shirt for all pre-entries up to midnight on Saturday 12th March.
  • Your t-shirt is to be picked up inside the race HQ after you finish the race. 
  • You must produce your race number to collect it. 
  • The t-shirt size is allocated as requested by you at time of entry and is written on the front of your race number.
  • For entries on the day we cannot guarantee a race t-shirt, but we always endeavour to provide one.
  • T-shirt sizing - we do our best to ensure that the sizes of shirts are realistic to what people would expect for a given label size but this is not an exact science. However if we become aware of a sizing issue we will adjust what is ordered.
  • The 2017 t-shirt is shown below.

 San Domenico 20 Shirt 2017

Prize presentations and results

The awards ceremony will take place at race headquarters at around 1:15PM. On race day, provisional results will be displayed at race headquarters as soon as available. Results will also be posted on the San Domenico website as soon as possible after the race: www.sandomenico.uk

Race categories, team competitions and course records

Female:1st, 2nd, 3rd. 1st in each of the following age categories - FV35, FV45, FV55+.

Male: 1st, 2nd, 3rd. 1st in each of the following age categories - MV35, MV45, MV55, MV65+.

Team prize: First 4 to count  - based on finish position.

Course records - modified course introduced in 2015.

Female Angharad Mair Les Croupiers RRC 02:24:31
Female V35-44 Lisa Brindley Maindy Harriers 02:50:18
Female V45-54 Angharad Mair Les Croupiers RRC 02:24:31
Female V55+  Shirley Hume Westbury Harriers 02:56:34
Male Tom Charles Trafford AC 01:53:51
Male V40-49 Richard Gardiner Aberdare VAAC 01:56:19
Male V50-59 Paul Rose Maiden Newton Runners 02:18:22
Male V60-69 Christopher Nellins Penarth & Dinas Runners 02:36:19
Male V70+ N/A N/A N/A

Race results and photos

The 2015 race results are here

Please visit our 'flickr' site to see photos from previous years - here.

There is a Travelodge located 200 metres from the race HQ, see their website for details - 
There are several hotels and B&B's in the area, a typical search engine is http://www.bedandbreakfastsearcher.co.uk/south-wales/merthyr-tydfil.asp

Directions to the event
The Race HQ, Start and Finish are at Rhydycar Leisure Centre, Merthyr Tydfil, CF48 1UT. Take the junction sign-posted; 'Merthyr Town Centre' and 'Rhydycar' from the A470 dual carriageway. This will take you under a steel bridge. At the first roundabout, take the 3rd exit (right) to Rhydycar Leisure Centre. Rhydycar Leisure Centre will be on your left. Parking is available in front of and to the side of Rhydycar Leisure Centre. The race HQ is in the main hall.

2009 SD20 Start 14


By: Stectech

Web Design Company

Website/Forum login

Search this website

Go to top

We use cookies to improve our website and your experience when using it. Cookies used for the essential operation of this site have already been set. To find out more about the cookies we use and how to delete them, see our privacy policy.

  I accept cookies from this site.
EU Cookie Directive Module Information