Run, jog or walk the ultimate 100km adventure. Incredible scenery, a challenging route and second-to-none support, it’s no surprise we have been voted the UK’s Best Endurance Event for the past three years.
Lined with Bronze Age hill forts, Neolithic burial chambers and Roman river crossings, you will step in the same footsteps as travellers who lived over 5,000 years ago.

You will get the full Threshold experience, including fully-stocked pitstops laden with food and drinks, an overnight Basecamp and tireless support from our crew and medics who will help you every step of the way.
Choose to complete the 100km non-stop or decide to split the distance over 2 days, the choice is yours!