Chiltern 50 Ultra Challenge
Sat 27 Sep 2025 Henley-on-Thames, Buckinghamshire, UK

Chiltern 50 Ultra Challenge

A beautiful, end-of-season, looped challenge in some of the Chilterns' finest countryside, with historic trails, rolling hills, nature reserves and fantastic views with routes from 10km up to 50km.

3 races

  • Sat 27 Sep
  • #1 of 3
Henley Showground, Henley-on-Thames

Full 50km

07:00

Age 18 & over

£139

  • 50 km trail running + 920 m ascent
  • Sat 27 Sep
  • #2 of 3
Henley Showground, Henley-on-Thames

Henley 25km Loop

08:30

Age 14 & over

£89

  • 25 km trail running + 500 m ascent
  • Sat 27 Sep
  • #3 of 3
Henley Showground, Henley-on-Thames

The Chiltern 10K

10:00

Age 15 & over

£39

  • 10 km trail running + 235 m ascent

Event overview

At the basecamp in Henley, there’s a Saturday night celebration BBQ, bar and entertainment, with extensive on-site camping and parking options.

These routes with real variety and wonderful scenery and are easily accessible from London. You’ll get full support and hospitality, and with a 10km and 25km loop also available, there’s a Chiltern Ultra Challenge® for everyone!

The Ultra Challenge Experience

This challenge is part of the UK's number one series of trek and trails runs for a wide range of ages, fitness and experience levels.

Choose your challenge and do it at your pace. The level of support enables you to go further, whilst enjoying the great outdoors, camaraderie, and the challenge. There are marquee rest stops, lots of food and drink, medical and massage teams, with a fully signed route to guide you.

A big finish-line celebration awaits with an amazing sense of achievement and once the aches subside you’ll feel energised, up for more of life’s real challenges – and, maybe, personal horizons redefined.

  • Event village
  • Families
  • Newcomers
  • Traders at event

Your challenge, your way

Whether you’re a walker and new to challenge events, an experienced trekker, a marathon enthusiast upping the distance, or a seasoned ultra runner after UTMB points – there’s an Ultra Challenge® for you! Walk, Jog, or Run at your pace, as an Individual or a Team, for a charity of your choice or just for you. There’s an Ultra March® option for ‘fast walkers’ – and a new ‘Solo Challenger’ start time to join up with others.

Best support & hospitality

This Ultra Challenge® famously lays on the best support and hospitality available on any UK endurance-style event. This enables you to step up and confidently tackle an 'Ultra' distance, with the best chance of success - and to enjoy your challenge! Here's a summary:

Before

  • Challenge app
  • Facebook forum
  • Training guides
  • Fundraising support
  • Training walks and runs
  • Video briefings
  • Travel planning
  • Parking

During

  • Baggage transfers
  • The start line
  • Chip timing and tracking
  • Rest stops
  • Food and drink
  • Medical support
  • Camping

Along the route

  • Fully signed route
  • Apps, maps and GPS
  • Route safety experts
  • Emergency response
  • Trek masters
  • 24 hour control room

After

  • Finish line experience
  • Finish times and certificate
  • Shuttles and transfers
  • Hot meal
  • Medical care and follow up
  • Deals on future challenges

  • Bag storage
  • Bag transfer
  • Bar
  • BBQ
  • Cafe
  • Camping
  • Music
  • Paid parking
  • Rural
  • Showers
  • Toilets
  • Urban

Event HQ

Henley Showground
Marlow Road
Henley-on-Thames
Buckinghamshire
RG9 3AS
UK

Map

Click here to open map

What3words

///amplifier.enjoy.busters

Charity places

Charity places are also available in this event. Secure your place now with one of our charity partners.

Get charity place

The support and friendliness of the staff and volunteers everywhere has been amazing - obviously all rest stops and walking through the finish line. Also the night-time route signage with the glow sticks was AMAZING!!

I love the level of support from everyone. There’s a great atmosphere and that’s part of why I love doing these challenges. My friend now loves them too!

Races at event

  • Sat 27 Sep
  • #1 of 3
Henley Showground, Henley-on-Thames

Full 50km

07:00

Age 18 & over

£139

  • 50 km trail running + 920 m ascent
  • Sat 27 Sep
  • #2 of 3
Henley Showground, Henley-on-Thames

Henley 25km Loop

08:30

Age 14 & over

£89

  • 25 km trail running + 500 m ascent
  • Sat 27 Sep
  • #3 of 3
Henley Showground, Henley-on-Thames

The Chiltern 10K

10:00

Age 15 & over

£39

  • 10 km trail running + 235 m ascent