How far is the Radyr Trail Races?

The Radyr Trail Races offers 2 distances: Marathon (42.3 km / 26.3 miles), Half marathon (21.9 km / 13.6 miles).

How much climbing is in the Radyr Trail Races?

The Marathon has 1,297 m of ascent. The Half marathon has 605 m of ascent.

How hard is the Radyr Trail Races?

Marathon: Very Hard. Half marathon: Hard. Distances are measured off the course file. Where the file carries no elevation, the climb is the organiser's published figure.

Is the Radyr Trail Races course marked?

No. The Radyr Trail Races is not a marked course. You are expected to navigate it yourself.

What are the cut-offs for the Radyr Trail Races?

Overall time limits — Marathon: 8h, Half marathon: 5h 30m.

Can I download the Radyr Trail Races route?

Yes. The GPX for each distance is free to download here, with no sign-up, the same as every route on Trail Running Planet.

When is the next Radyr Trail Races?

Sat, 8 May 2027, 08:00. Not open yet.

Ridge Runners Radyr Trail Races

Cardiff Harlequins RFC, Diamond Ground, Forest Farm Road, Whitchurch, CardiffSat, 8 May 2027

Half and marathon from Radyr over the Garth and Castell Coch woods

Distance	Ascent	Per km
42.3 km Marathon	1,297 m	32 m
21.9 km Half marathon	605 m	26 m

woodlandforestcanalNavigation required

Nobody has reviewed this one yet

No reviews of the Radyr Trail Races, and nothing on what people wore. Both are things no organiser publishes and every runner wants before they enter — how it actually went, and what was on your feet.

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VERY HARD

TRP grade · E4

8h cut-off, which needs 11:20/km

starts 08:00

Download GPXFree, no sign-up.

This file is from a previous running and the course may have changed since. If you are navigating with it, get the current version from Ridge Runners first.

What you’re in for

From Cardiff Harlequins' ground at Radyr, the half marathon crosses the Taff, climbs through farmland and woods to Coed-y-Bedw nature reserve and up Garth Mountain, then drops to Taff's Well and runs through Castell Coch woods before a flat finish past the Glamorganshire Canal. The marathon (about 1,300m of climb) adds three loops: out to Creigiau and an old railway line, round Craig yr Allt towards Caerphilly, and through the bluebell woods of the Wenallt. The half is marked with two checkpoints; the marathon sections away from it are unmarked and need navigation, with maps and a GPX supplied. Radyr station is five minutes' walk away, and there are showers at the venue.

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How to enter

Sat, 8 May 2027 · Not open yet · £40–£50

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Common questions

: The Radyr Trail Races offers 2 distances: Marathon (42.3 km / 26.3 miles), Half marathon (21.9 km / 13.6 miles).
: The Marathon has 1,297 m of ascent. The Half marathon has 605 m of ascent.
: Marathon: Very Hard. Half marathon: Hard. Distances are measured off the course file. Where the file carries no elevation, the climb is the organiser's published figure.
: No. The Radyr Trail Races is not a marked course. You are expected to navigate it yourself.
: We don't hold a compulsory kit list for the Radyr Trail Races. Ridge Runners confirm mandatory kit in their race information, usually in the final instructions.
: Overall time limits — Marathon: 8h, Half marathon: 5h 30m.
: We don't hold a checkpoint list for the Radyr Trail Races. What's on the table varies a lot between races, so check the Ridge Runners race information rather than turning up expecting food.
: Yes. The GPX for each distance is free to download here, with no sign-up, the same as every route on Trail Running Planet.
: Sat, 8 May 2027, 08:00. Not open yet.