- Sat 26 Sep 2026
08:30
Age 14 & over
£89
- 25 km trail running + 500 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 endurance event is for a wide range of fitness and ages. Choose your distance and do it at your pace. The support enables you to go further, whilst enjoying the great outdoors and camaraderie.
There are marquee rest stops, plenty of food and drink, medical and massage teams, and a fully signed route with GPS tracking to guide you. A big finish-line celebration awaits with an amazing sense of achievement, and once the aches subside, you’ll feel energised and up for more of life’s challenges!
This event is part of Chiltern 50 Ultra Challenge.
Event photos
Event video
- Average fitness
- Beginner-friendly
- Event village
- Families
- 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 runner after ITRA points, there’s an Ultra Challenge® for you! Walk, Jog, or Run your chosen challenge – as an Individual or a Team, for a charity of your choice or just for you.
On the Full challenges, there’s a new Ultra Trailblazerz® option for ‘rapid runners’, and an Ultra March® option for ‘hasty hikers’, plus a friendly ‘Solo Challenger’ start time to join up with others.’
The Chiltern 50 Ultra Challenge® is fun, safe, and rewarding, with full support all the way, enabling you to push yourself further in stunning scenery. With camping options, parking and shuttle bus transfers, it will be a fantastic weekend in the Chilterns!
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!
- Check points
- Distance markers
- First aid
- Food stations
- Marshals
- Mass start
- Toilets
- Undulating
- Water stations
- Way markers
Overview
Take on the 25km looped route starting and finishing at the Henley basecamp taking in the best of the scenery, it’s easy to join and leave with bookable parking and overnight camping options.
Map
Checkpoints
- Snacks and drinks | 12km
- 25km | hot meal
- Finish | glass of fizz, medal and t-shirt
- Bag transfer
- Bar
- BBQ
- Cafe
- Camping
- Music
- Paid parking
- Rural
- Secure bag storage
- Showers
- Toilets
- Urban
Event HQ
Henley Showground
Marlow Road
Henley-on-Thames
Buckinghamshire
RG9 3AS
UK
- Camping
- Drinks
- Event app
- Fizz at the finish
- GPS tracking
- Map
- Massage
- Medal
- Post-race meal
- Pre-event training sessions
- Snacks
- Training plan
- T-shirt
Before
- Challenge app
- Facebook forum
- Training guides
- Fundraising support
- Training walks and runs
- Video briefings
- Travel planning
- Parking
During
- Baggage transfers
- The start line
- Timing and GPS 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
Bookable extras
- Camping packages
- Parking
- Pre challenge transfers
- Post challenge transfers
- Extra meals
- Baggage services
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!
Do it for charity
Looking to do this event for charity? Do it for one of the charities below or see the full list of charities on the Chiltern 50 Ultra Challenge charity places | Henley 25km Loop page.
- Age 14 & over
- Entries open
- to 26/09/2026
- Charity places
- Enter online
- Event merch available
Under 18s need to be accompanied by an adult.
Entry fees
Entry fee
£89.00
Other races at event
- Sat 26 Sep
- #1 of 3
06:45
Age 16 & over
£139
- 50 km trail running + 920 m ascent
- Sat 26 Sep
- #3 of 3
10:00
Age 8 & over
£49
- 10 km trail running + 235 m ascent