Ultra Challenge Series - Walk, Jog or Run! Ultra Challenge Series WALK, JOG OR RUN! Spring Deal offers!! 100km 50km 25km £10 off all registration fees 23SPRING100 £7.50 off all registration fees 23SPRING50 £5 off all registration fees 23SPRING25 List of challenges Easter 50 Challenge- 1st April Click here for more information Isle of Wight Challenge- 29th - 30th April Click here for more information Jurassic Coastal Challenge- 13th - 14th May Click here for more information London 2 Brighton Challenge- 27th - 28th May Click here for more information Lake District Challenge- 10th - 11th June Click here for more information Cotswold Way Challenge- 24th - 25th June Click here for more information Peak District Challenge- 8th - 9th July Click here for more information North Downs 50 Challenge- 22nd July Click here for more information South West Coast Challenge- 5th August Click here for more information South Coast Challenge- 2 - 3 September Click here for more information Thames Path Challenge-9 - 10 September Click here for more information Thames Bridges Trek- 9th Sept Click here for more information The Henley 10K- 10th Sept Click here for more information Chiltern 50 Challenge- 23rd Sept Click here for more information Manage Cookie Preferences