Chiltern 50

Take in the Chilterns finest countryside, with rolling hills, historic trails, nature reserves, and fantastic views.

About the event

The Chiltern 50 Ultra Challenge is a scenic loop through some of the finest countryside in the Chilterns—an ideal way to get active while supporting St Mungo’s.

Starting and finishing at the Henley basecamp, the 50km route features historic trails, rolling hills, nature reserves, and stunning views. With full support throughout, plus a Saturday night celebration with food, entertainment, and camping options, it’s a rewarding experience for all. By fundraising for St Mungo’s, you’ll be helping people experiencing homelessness access accommodation, vital support services, and the chance to rebuild their lives.

People hiking the an Ultra Challenge for St Mungo's

£20-139

Registration fee

27 September 2026

Date of event

£0-375

Fundraising target

10-50km

Race distance

What you'll get from the event

  • Tea, coffee, snacks and water
  • Picnic lunch
  • Glass of fizz at the finish, medal and a t-shirt
  • For the longer challenges, a hot meal is also provided
  • Details on camping and parking are available here.
People participating in the Gower Ultra Challenge

What you'll get from St Mungo's

  • A fundraising pack filled with top tips to increase your sponsorship.
  • St Mungo’s top to represent us on the day.
  • Access to our online community where you can chat to other challengers.
  • Support from our dedicated events team who will give you one to one advice all the way.
Two people participating in a St Mungo's Challenge Event

Fundraising Options

Self funding 

You pay the full cost of the event place – fundraise whatever you want, with no set target or deadline.

  • 10km: £39
  • 29km: £89
  • 50km: £139

 

Charity Sponsorship

You pay a small registration fee, do lots of fundraising and we cover the cost of your event place.

  • 10km: Reg fee £20 / fundraising target £100
  • 29km: Reg fee £30 / fundraising target £275
  • 50km: Reg fee £40 / fundraising target £375

 

Mixed Funding

Pay half of the event place cost yourself, fundraise a bit less and we pay the balance of the event place cost.

  • 10km: Reg fee £22.50 / fundraising target £70
  • 29km: Reg fee £50 / fundraising target £150
  • 50km: Reg fee £75 / fundraising target £225