There's a new event on the calendar for August 18th and it promises to be one of the toughest of the summer. The Afan Forest 50k & 100k Enduro comes to south Wales under the XTERRA banner, best known for their off-road triathlons. The route covers sections of the infamous Whites Level and Skyline trails plus other virgin sections of our favourite forest.

Both distances begin from the Glyncorrwg visitor centre using a staggered start. The 50km is challenging without you needing to be an uber-skilled mountain biker or possess Olympian levels of stamina; the 100km is gruelling in the extreme and only the brave of the bike world will complete the course without using the bail out sections to come home early.

The demanding course necessitates bail out options after the 50k mark allowing people to cut short the route at roughly 10k intervals. Three aid stations will provide food, water, energy drink, mechanical assistance and first aid (we advise that riders bring good supplies and use the XTERRA stations to top up).

Start time is between 8 and 9am with everyone needing to be off the mountain by 7:30pm. A post-event knees up at the Drop-Off Café in Glyncorrwg will end the day with live music. You can enter online at www.xterra.co.uk or if last minute is more your thing the organisers will accept entries on Friday afternoon and Saturday morning at the venue while spaces are available.

Details are also available on this site for the XTERRA UK Triathlon held in the same locality on 16 September. Championship Triathlon 1500m swim, 29k MTB, 10k Trail Run, Sport Triathlon 750m Swim, 15k MTB (non Technical) 5k Trail Run. Both events are available as a team relay with one person doing each event.