Take on 25 km or 50 km

Walk, Jog, or Run it

As a Team or an Individual…

.. for You or for a Charity

25 September 2021

This end of season 50 km looped route covers some of the best of the Chilterns countryside, with historic trails, rolling hills, nature reserves, and fantastic views. Starting & finishing at our base-camp in Henley, there’s a Saturday night celebration BBQ & entertainment with extensive on-site camping & parking options. It’s a route with real variety and some wonderful scenery – and it’s all easily accessible from London. You’ll get full support & hospitality all the way, and with a 25 km option also – there’s a Chiltern Challenge for everyone!

Early Bird Deal Now On!

Free tech tee worth £20
& save £££s

The 'Ultra' Experience

Endurance events for a wide range of fitness & ages – choose your challenge and do it at your pace. Our full support enables you to dig deep and go further, whilst enjoying the great outdoors & camaraderie. There’re marquee rest stops, lots of food & drink, medical & massage teams, with a fully signed route to guide you. At your finish-line a big celebration awaits with an amazing sense of achievement, and once the aches subside you’ll feel energised, and up for more of life’s real challenges!

Good preparation & smart planning are key, and from the moment you sign up you’ll have access to our Challenge App – with training guides, optional training walks, maps, online forums, and the latest news & updates.

Rest Stops every ~12.5 km with ‘major’ ones every ~25 km, and are much more than the shaky gazebo with water that you see on some events. We’ve marquee cover, large medical & welfare tents, catering services, seating areas for recovery, changing rooms, and a friendly welcome!

There’re pink arrows to guide you, distance markers, glow-sticks at night, hazard signs, and a route map in the App. Our ‘Trek Masters’ organise group departures at night so nobody has to walk solo. Our chip timing system enables our Control Room, and your friends / family, to track your progress through the Rest Stops.

Keeping you well fed & hydrated is key. We pride ourselves on the quantity & quality of our catering, and whichever distance you are on – meals, snacks & drinks are included – so no need to carry much!

  • Snacks & drink stops every 12.5 km
  • Snacks – from the healthy to treats
  • Main meals / hot food every 25 km
  • Energy drinks
  • All dietary requirements catered for
  • Lighter options for ‘runners’
  • BBQ finishers meal

We generally have a ~50 km campsite for rest & sleep if you’re on the 2 day ‘Daylight’ 100 km option, or if you finish / start a 50 km ‘half’ Challenge. Book an inclusive package or ‘pitch your own’ – there’re showers and chill out areas.

We’ve experienced Doctors, Paramedics, First Aiders, Podiatrists, and Massage Teams at Rest Stops. There’re ‘Self Help’ areas with blister plasters, talc, Vaseline, and tape if you want to patch your own feet. Our mobile Emergency Medical Teams are only a phone call away, via our 24 hour Control Room

We don’t want you to forget that finish-line moment – our Cheer Squad will ensure you won’t! You’ll get a medal, finisher’s T-shirt, and a glass of fizz, before heading to a BBQ and a well earned rest. Download your official Challenge certificate when you’re ready.

There’re shuttles to local train stations for onward travel, and most finish lines have parking so supporters can meet you. We’ve bus ‘transfers’ to / back to key venues (eg the start) – and check out the ‘Bookable Extras’ for details of all transport options.

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 – as an Individual or a Team, for a charity of your choice or just for you. The Chiltern Challenge is fun, safe, and rewarding – with full support all the way, enabling you to push yourself further and celebrate your achievements.

Date: Sat 25 Sept

Start & Finish: Henley Showground

Distance & Elevation: 50 km & 920 m elevation


Date: Sat 25 Sept

Start: Henley Showground

Finish: Lewknor

Distance & Elevation: 25 km & 400 m elevation

Date: Sat 25 Sept

Start: Lewknor

Finish: Henley Showground

Distance & Elevation: 25 km & 500 m elevation

2021 Route Map

We were one of the UK’s first ‘Covid Secure’ mass participation challenges in 2020 – and we will also be implementing standardised measures to keep all participants safe whilst on each challenge in 2021. You’ll see special social distancing requirements & hygiene measures in place across many elements of the events, ensuring each Ultra Challenge is as low risk as possible for everyone involved.

How to Join

Self Funding
for You

Pay for your place in full, with no fundraising target but you can raise of you like!

Full Sponsorship for Charity

Pay a small registration fee & commit to fundraise for a charity of your choice.

Mixed Funding for Charity

Pay half your place, & fundraise a smaller target for your chosen charity.

Early Bird Deals Now On!

FREE Tech T-shirt worth £20
& save £££s

Charity Partners

We’re proud to work with a range of fantastic charities, which will benefit from the £7+ million fundraising in 2021. Our Series Partners are some of the UK’s major national charities, and there’re also regional and local charities as Challenge Partners for each event. Choose to fundraise for a Charity Partner and they’ll provide support to help you reach your target!

or fundraise

Download Factsheet

All you need to know about the Challenge – a detailed overview of the options & how you can take it on. Print it off or send it to your friends! 

Check out the Challenge Options

Ready to sign up now?

Covid Secure Measures

face masks in key zones at rest stops

hand sanitising & cleaning stations

personal medical declaration. Screening if required

start times staggered & spread out on the route

social distancing at all times

venue, facilities & route directional flow

drinks served by our team & one way flow

no self service & adjusted menus

restricted supporter numbers at rest stops

Early Bird extended




1 Event = 10% Off Early Bird

2 Events = Duo Deal – 30% Off 2nd 

3 Events or more – Multi Deals



1 extra Event = 30% Off your 2nd

2+ extra Events = Multi Deals 


A 2019, 2018, 2017 CHALLENGER

1 Event = 10% Off Early Bird

Plus extra 10% Off Past Pax Deal

2 Events = Duo Deal – 30% Off 2nd

3 Events or more – Multi Deals

For details of Duo Deal, Multi Deals
& Past Participant Discount...

All 500+ you can fundraise for

Bath Cats and Dogs Home
Battersea Dogs & Cats Home
Blue Cross
Cats Protection
Compassion in World Farming
Dogs For Good
Dogs Trust
International Animal Rescue 

Rare and Endangered Species Trust
Senior Staffy Club
Shark Trust
Support Dogs
The David Shepherd Wildlife Foundation
The CATS Foundation    

The Humanimal Trust
Veterans for Wildlife
World Land Trust

Abbie’s Army    
Action Bladder Cancer UK
Bone Cancer Research Trust
Bowel Cancer UK
Brain Tumour Research
Breast Cancer Now
Cancer Research UK
Children With Cancer
Children’s Cancer and Leukaemia Group
Cure Leukaemia
DT38 Foundation

Genesis Research Trust
Helen Rollason Cancer Charity
Jo’s Cervical Cancer Trust
Kidney Cancer UK
Kidney Cancer Suport Network
LATCH Welsh Childrens Cancer Charity
Leukaemia UK
Look Good Feel Better
Lymphoma Action
Macmillan Cancer Support
Maggie’s Cancer Care

Marie Curie
Mesothelioma UK CIO
Mummy’s Star
Myeloma UK
OcuMel UK
Odyssey Project Ltd
Oracle Cancer Trust

Orchid Cancer appeal
Ovarian Cancer Action
Pancreatic Cancer Action
Pancreatic Cancer Research Fund
Pancreatic Cancer UK
Penny Brohn UK    
PLANETS Cancer Charity
Prostate Cancer Research Centre
Prostate Cancer UK
Rosemere Cancer Foundation
Roy Castle Lung Cancer Foundation
Sarcoma UK
secondary 1st
Shine Cancer Support
Skeletal Cancer Trust (SCT)
Somerset Unit for Radiotherapy Equipment (SURE)

Target Ovarian Cancer
Team Verrico
Teenage Cancer Trust
Teens Unite Fighting Cancer
The Brain Tumour Charity
The Christie
The Errol McKellar Foundation
The Eve Appeal (Gynaecology Cancer Research Fund)
The Institute of Cancer Research
The Joshua Wilson Brain Tumour Charity
The Royal Marsden Cancer Charity
The Urology Foundation
Topic of Cancer    
Tuberous Sclerosis Association (TSA)    
Wessex Cancer Trust    
Willow Foundation
Wolo Foundation

A-T Society
ActionAid UK
Action for Children
ADAPT Prembabies Limited

Albion in the Community    
Anthony Nolan
Arms Around the Child
Babies in Buscot Support
Bright Horizons Foundation for Children
Cardiac Risk in the Young
Caudwell Children
Charley Paige Trust

Child Bereavement UK
Childhood First
Children on the Edge

Children’s Liver Disease Foundation
CHUMS Charity
City YMCA, London
Clic Sargent
Cochlear Implanted Children’s Support Group

Diverse Abilities
Dreams and Wishes    
Edward’s Trust    
Empire Fighting Chance
First Days Children’s Charity
Fondation Sarah Grond

Forward Facing
Friends of Grovelands School
Friends of the East Riding Youth Orchestras    
Girlguiding North West England    
Hope and Homes for Children
Jamie’s Farm    

John Thornton Young Achievers Foundation
Just Helping Children
Little Heroes Comics
Make A Wish
Momentum Children’s Charity
Mosaic-Supporting Bereaved Children
National Deaf Children’s Society    
Nepal Youth Foundation UK
Newlife The Charity For Disabled Children
Sam’s Rainbow Foundation

Santa Maria Foundation   
Sophie Rolf Trust    
Square Peg Activities Limited
Ripples Of Compassion
Taylor Made Dreams   

The Amber Foundation    
The Bethany Children’s Trust
The Brompton Fountain 

The Childhood Trust
The Children’s Hospital Charity

The Children’s Trust
The Compassionate Friends

The Ellie Thornton Foundation   
The Grand Appeal
The Julius Little Foundation
The Mudlarks Community

The Sarah Groves Foundation  
The Wave Project
Together for Short Lives


Access Sport CIO
Ascend: Leadership Through Athletics
Adur Special Needs Project
Age Exchange

Asha for Education
Bright Ideas for Tennis

Education Support
Exeter Royal Academy for Deaf Education
Friends Of Shenstone
Horatio’s Garden

INTO Giving

Mines Advisory Group
MZ And KZ Shah Foundation
National Literacy Trust

Student Minds
Restore Hope
Teach First

The Change Foundation
The Climate Change Organisation, trading as The Climate Group

The Great Generation
The Prince’s Trust
The Talent Tap
Youth Adventure Trust

Acorns Children’s Hospice
Arthur Rank Hospice Charity
Chestnut Tree House
Compton Care
Countess Mountbatten Hospice Charity  
Countess of Brecknock Hospice Trust

Demelza Hospice Care
Douglas Macmillan Hospice  
East Anglia’s Children’s Hospices
Farleigh Hospice
Forest Holme Hospice Charity
Garden House Hospice Care
Greenwich & Bexley Community Hospice
Haven House Children’s Hospice
Havens Hospice
Helen & Douglas House
Hospice in the Weald
Hospice UK
Hospice of the Good Shepherd
Isabel Hospice
John Eastwood Hospice Trust

John Taylor Hospice    
Julia’s House
Julian House
Keech Hospice Care
Kirkwood Hospice

Martlets Hospice
Michael Sobell Hospice    

Naomi House Children’s Hospice
Pembridge Hospice Charity
Phyllis Tuckwell Hospice Care    
Pilgrims Hospice
Prospect Hospice Ltd
Rainbows Hospice For Chidren and Young People
Rennie Grove Hospice Care
Richard House Children’s Hospice
Rowans Hospice
Salisbury Hospice Charity
Severn Hospice
Skanda Vale Hospice 
Sobell House Hospice Charity
St Andrew’s Hospice (Lanarkshire)   

St Barnabas Hospice    
St Barnabas House
St Catherine’s    
St Catherine’s Hospice
St Christopher’s Hospice
St Helena Hospice    
St John’s Hospice
St Lukes Hospice (Basildon & Thurrock)
St Margarets Hospice Care
St Nicholas Hospice Care
St Peter & St James Hospice
St Peter’s Hospice
St Raphael’s Hospice
St Wilfrid’s Hospice    
St Michael’s Hospice (North Hampshire)    
Thames Hospice
The Friends of the Wisdom Hospice
The Myton Hospices
The Prince of Wales Hospice
Wakefield Hospice
Weldmar Hospicecare
Willen Hospice
Woking & Sam Beare Hospice and Wellbeing Care
Zoe’s Place Baby Hospice

Action Duchenne
Action for A-T
Action for M.E.
Action Medical Research
Action Pulmonary Fibrosis
Age UK Cornwall & Sicilly Isles
Air Ambulance Kent Surrey Sussex
Allergy UK
Alzheimer’s Research UK
Alzheimer’s Society
Alzheimer Scotland
Ambitious about Autism

Angels Support Group Hitchin
Archie’s Army

Asthma UK
Ataxia UK
Autism Forward
Behçet’s UK
Berkshire Vision
Blue Skies Hospitals Fund 

British Acoustic Neuroma Association
British Heart Foundation
British Liver Trust
British Lung Foundation

British Skin Foundation
Burning Nights CRPS Support

Cardiomyopathy UK
Caring Matters Now
Centre for ADHD & Autism Support
Cianna’s Smile
CICRA better lives for children with crohns and colitis
Cleft Lip and Palate Association
Confederation of Meningitis Organisations
Crohn’s And Colitis Concern UK

Crohn’s & Colitis UK
Deafblind UK 

Dementia UK
Devon Freewheelers    
Different Strokes
Dorset Blind Association    
Down’s Syndrome Association
Dyspraxia Foundation 

Eddie Byers Trust
Edinburgh Headway Group
Encephalitis Society
Epilepsy Action
Epilepsy Research UK
Epilepsy Society
Fibromyalgia Action UK
Fight for Sight
Focus Birmingham

Genetic Alliance UK
Group B Strep Support
Guillain-Barré & Associated Inflammatory Neuropathies (GAIN)
Guts UK
Hampshire and Isle of Wight Air Ambulance
Hearing Dogs for Deaf People
Huntington’s Disease Association
Ichthyosis Support Group
Imperial Health Charity
Independent Age
Kate’s Adventure Fund 

Kent Association for the Blind
Kent MS Therapy Centre

Kidney Care UK
Kidney Research UK
Kit Tarka Foundation
Kleine Levin Syndrome 
Lilian Faithfull Care 
London’s Air Ambulance Charity
Magpas Air Ambulance
ManKind Initiative    
Medical Research Foundation
Midlands Air Ambulance Charity
Moorfields Eye Charity
Motor Neurone Disease Association
MS Society
MS Trust
Multiple System Atrophy Trust  
Muscular Dystrophy UK 

Myotubular Trust
NASS – National Ankylosing Spondylitis Society
National Association for Children of Alcoholics (Nacoa)    

National Kidney Federation
National Rheumatoid Arthritis Society
National Tremor Foundation
Nephrotic Syndrome Trust (NeST)
Northamptonshire Health Charity 

Nystagmus Network
Operation Smile UK
Overcoming MS

PAPYRUS Prevention of Young Suicide
PKD Charity
Positive East

Prader-Willi Syndrome Association UK
Pregnancy Sickness Support    
PSP Association
RASASC Guildford
Reigate and Banstead Womens Aid

Retina UK
Reverse Rett
Rock 2 Recovery
Royal Osteoporosis Society
Salus Fatigue Foundation
Scleroderma and Raynaud’s UK
Scoliosis Campaign Fund
Somerset Unit for Radiotherapy Equipment (SURE)

Spinal Research
St Mark’s Hospital Foundation

Stroke Association
SUDEP Action
Support 4 Sunflowers    

Survivors of Bereavement by suicide
Terrence Higgins Trust    
The Brain & Spine Foundation
The Cure Parkinson’s Trust
The Ectopic Pregnancy Trust

The Felix Project
The Kaleidoscope Plus Group
The Lily Foundation
The Lullaby Trust
The Maypole Project
The ME Association
The Migraine Trust
The National Brain Appeal
The Robert Jones & Agnes Hunt Hospital
The Sickle Cell Society
The Sussex Beacon
Throat Cancer Foundation
Thrombosis UK

Thyroid UK
Tiny Tickers

UK Infantile Spasms Trust
UK Sepsis Trust
Vascultis UK
Versus Arthritis
Vision Foundation 

Walk the Walk

Action on Addiction

Beyond Shame Beyond Stigma
Buckinghamshire Mind
CALM – Campaign Against Living Miserably
Combat Stress
Cruse Bereavement Care

Devon Partnership NHS Trust Special Charity    
Dorset Mind
Gloucestershire Counselling Service
Grief Encounter 

Guernsey Mind
Inner South West London Samaritans    
Mental Health Foundation
Mental Health Research UK
Mental Health UK

MIND (Isle of Wight Challenge , London 2 Brighton Challenge, Jurassic Coast Challenge, Cotswold Way Challenge, South Coast Challenge, Thames Path Challenge & Thames Bridges Trek ONLY)
Mind in Somerset
Music for my Mind
OCD Action
Solent Mind
South East and Central Essex Mind 
Suicide Prevention Bristol
Woking Mind


ABF The Soldiers’ Charity (South East)
Blesma, The Limbless Veterans
Felix Fund
Help for Heroes
RAF Benevolent Fund
RBLI – Royal British Legion Industries 

RMA- The Royal Marines Charity
Royal Air Forces Association   
Royal Navy and Royal Marines Charity
Sailor’s Society

Scotty’s Little Soldiers
Stoll (The Sir Oswald Stoll Foundation)
Veterans Aid 

ActionAid UK
CoCo’s Foundation
Consortium for Street Children

Farm Africa 
Global Conservation Force (GCF)

Link Age Southwark
Mark Evison Foundation

Medecins Sans Frontieres UK  
New Futures Nepal
Quicken Trust
Refugee Action
Release International
Shamida Ethiopia

The Adventure Boutique Foundation
The Hummingbird Refugee Project

The Hunger Project UK
The Mission to Seafarers

Village Africa
VSO – Voluntary Service Overseas
World Merit

Access Adventures

Age UK Cornwall & Sicilly Isles
Age UK Lambeth
Age UK Medway
Alabare Christian Care & Support
Amnesty International UK
Ben – Motor and Allied Trades Benevolent Fund
Bournemouth Foodbank
British Red Cross
Broadmead Baptist Church
Central London Samaritans

Centre for Women’s Justice   
CPRE – The Countryside Charity

Crisis UK
Dandelion Time
East Teignbridge/Dawlish Community Transport    

Enham Trust
Essex & Herts Air Ambulance
Family Fund
Fertility Network UK
Fulham Reach Boat Club

Guy’s and St Thomas’ Charity (which includes Evelina London)
Guide Dogs for the Blind Association
Hestia Housing and Support
Hope Nottingham CIO
Little Village    
Lover Community Trust    
Multiple System Atrophy Trust
National Autistic Society
National Trust
North London Cares
Pamoja Leo
Red Balloon Foundation    

Refugee Support Europe
Solace Women’s Aid
South London Cares

St John Ambulance
St Mungo’s
Standing Voice    
Sue Ryder
Sufra NW London    
Thames Reach    
Thames Valley Air Ambulance
The Anthony Knights Foundation

The Benjamin Foundation
The Crawley Open House    
The Early Birth Association
The Ehlers-Danlos Support UK
The Fire Fighters Charity    
The Running Charity
The Salvation Army
The Silver Line
The Trussell Trust
The Waterside Centre, Kings Langley

The Woodland Trust    
Tibet Watch 
TRIBE Freedom Foundation
Turning Tides  

Warming up the Homeless
WAY Widowed and Young    
Women’s Aid Federation of England

Got a question?


Ultra Challenge Online Session!

Wed 4 Nov 6pm

Hear all about the 2021 Series!

Our Charity Partners

Search from over 400 charities you can fundraise for