Rebellion Ultra Marathon Logo
ITRA Logo UTMB Qualifying Race Supporting National Trails

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The Thwarted Rebellion is a 75 mile (120 Km) Ultra Marathon in Mid Wales starting on 23rd October 2020. It follows the first 75 miles of the Glyndwr's Way National Trail with a total ascent of just over 12,500ft (3810m). The event starts in Knighton, just on the Welsh border and finishes in Machynlleth. It is one of the most beautiful and demanding ultra running routes in the UK.


The Glyndwr's Way National Trail is an unusual National Trail as it doesn’t follow any particular geographic features or any historic routes and offers a great ultra running change. It is named after Owain Glyndwr who led a rebellion against the English and the last Welshman to hold the title Prince of Wales. The Glyndwr’s Way is an arbitrary route merely linking a variety of towns and villages with Glyndwr connections. This the reason for its unusual V shape.

The race starts at 19:00 on Friday the 23rd October 2020 and has a 40 hour time limit to reach Machynlleth (11:00 on Sunday 25th October 2020). Meaning competitors must average just 1.85 miles (3km) per hour to complete the race. There are 2 checkpoints on route that all competitors must pass through within a time limit. Each checkpoint is a community hall/leisure centre that is well stocked with food, hot drinks and water for competitors to recharge and re-supply.

Each competitor is given a GPS tracking device so we can track the atheletes all times during the race and family and friends can watch the races progress online. The GPS tracker is also equipped with a SOS button, so if you do have a problem we can find you.

If you want or need to withdraw from the event after starting, we will transport you to your nearest checkpoint where you can arrange your own transport home from there.

COVID-19 - If we are unable to run the event due to COVID-19 you will be offered a deferal or Full Refund minus the SiEntries Booking fee

Coach Option

Coaches can be booked at time of entry allowing to park your car at Machynlleth and get the coach to the start in Knighton, the coach cost is £10

Countryside Code

The route of the race goes through farm land, farms, private forests and private estates. As such the countryside code must be followed at all times. You are responsible for the opening and closing of gates during the race.

What you get

  • Dedicated Safety and Medical cover
  • GPS Tracker to use on the event. Family and spectators can track your progress online
  • Checkpoint refreshments
  • Up Hill Down Dale finishers momento
  • 10% discount on next race with Up Hill Down Dale

Top 3 finishers

  • Up Hill Down Dale special momento
  • Free entry to another Up Hill Down Dale event
  • Sponsor goodies

Taking Part

You do not have to have completed any qualifying races prior to entry but you MUST be prepared to be in remote locations for long periods and adverse weather and probably on your own. By entering the race you are stating that you deal with the conditions you will face in Wales in November. You are also stating that you can employ a level head in difficult conditions and not take unnecessary risks.

Drop Bag/Finish Bag

There is NO drop bags for this event, 1 finish bag is allowed and this will be made available to you at the finish in Machynlleth. Finish bags must be compact and completely sealed when you give them to us at the start.


The Thwarted Rebellion Winter s a ITRA and UTMB® qualifying race and has been awarded 5 points by the ITRA and UTMB®


Early bird price is £130, Full price from 01/03/20 is £150


If for any reason you are unable to attend the race, there will not be a refund or an option to defer your entry, however you are welcome to transfer your entry to another competitor via SiEntries, the cut off for transfers is 28 days prior to the start of the event..

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