challenge festival


Fri 8th - Sun 10th September

There’s a fantastic Thames Path Challenge event waiting for you in September, with 4 to choose from – and distance options ranging from a leisurely 10 km up to a demanding 100 km Ultra Challenge®. Take it on at your pace – with full support all the way, rest stops en route, plenty of food & drink, medics, new friends made, a special medal, and an amazing sense of achievement.

Walk, Jog, or Run 

10 km, 25 km, 50 km, or 100 km 

Perfect for Teams or Individuals

.. for You or for Charity

4 Events to choose from

Corporate Packages available

SEP 2023


Thames Path
Ultra Challenge®

The main event - in its 10th year!

Join 3,000 adventurers and take on England’s greatest river, with a ‘flat’ 100 km route heading out from Putney Bridge, past Hampton Court to Runnymede, of Magna Carta fame, at the 50 km half way. For the full challenge – it’s on to Windsor & Eton, then through wonderful historic scenery & countryside to the  Henley riverside finish line. With 50 km & 25 km distance options also, there’s an unforgettable Thames Path Ultra Challenge for everyone. 

The Thames is steeped in history, and the route heads upstream from our Putney Bridge start, to a riverside finish in Henley taking in – some wonderful countryside and historic towns along the way. With marquee rest stops every ~12.5 km, stocked with food & drink – and medics and welcoming staff on hand to support you.

– Full Challenge – 100 km as a full-on ‘continuous’ challenge – Putney Bridge to Henley.

– Full ‘Daylight’ – 100 km over 2 days with overnight camping option at halfway (or book a local B&B).

– 1st Half – 50 km from Putney to Runnymede, taking in Richmond & Hampton Court.

– 2nd Half – 50 km – Runnymede to Henley. Also Ideal to join up with a ‘Full 100 km’ friend.

– Quarters – if 25 km is more your thing – ALL 4 are available options – and all are great!

– Transport – pre & post challenge bus transfer & parking options to make it easy!

Camping –  packages available at 50 km Runnemede halfway stop (for 2 day Daylight ‘Full Challenge’ or ‘Half Challenge’ start / finish)

SEP 2023

Sat 9

Thames Bridges Trek

London's best walking event!

Trek across the Capital with unrivalled views of the skyline. Setting out from Putney Bridge – it’s East towards the City, zig-zagging over 16 of London’s historic bridges – each with its own fascinating story, and with a mid-point refreshment stop at The Oval Cricket Ground for snacks & drinks. 25 km later, beyond the majestic Tower Bridge, it’s a finish line celebration & some food in Southwark Park, where a big cheer, some fizz, a medal, food, & a celebration await!

The Thames Bridges Trek is a great way to see the best of London – with magnificent cityscape views & unfolding history. Over 2,500 will take it on, and there’s a party style atmosphere at the finish – with plenty of time to celebrate afterwards!

25 km – as a walk / trek (NO running of jogging allowed). Putney Bridge start – half way stop The Oval Cricket Ground – finish at Southwark Park. A great day out, and perfect for teams of friends, work colleagues, or family.


SEP 2023

Fri 8

Thames Moonlight 10 Walk

Up for an active Friday evening?

Kicks off the Thames Path Challenge festival of events on Friday evening. Take on a spirited 10km or an energetic 10 mile looped route through the heart of London as darkness falls, passing famous landmarks – including St Paul’s, Westminster Abbey, Tower Bridge, the London Eye and more. A lively finish awaits – with some fizz, a ‘Moon medal’, some welcome hot food & drink. Perfect to join with friends after work for an active evening on the town!

The ‘Moonlight 10 Walk‘ is on Friday evening, setting out from The Oval Cricket Ground. It will be a fun London evening along the Thames – and if you have the legs the local bar will be open afterwards for a bit of a celebration!

Take on an evening 10 km or 10 miles on a looped walking route – starting at The Oval. Hot food afterwards. Perfect for some exercise + some fun – ideal for groups of friends, work colleagues or family teams.


SEP 2023

Sun 10

... Riverside

Stretch the legs on Sunday!

It’s a fabulous 10 km loop from the riverside finish venue of the main Thames Path Ultra Challenge, near Henley Bridge. A great ‘mini’ challenge to take it on at your pace on Sunday morning as a walk, jog, or run and get your family & friends involved. There’s a souvenir challenge neck buff, finishers medal, glass of fizz, and an optional BBQ + a ‘Kids’ 2 K walk (with goodie bag) for the young challengers.

An action packed 10 km, with a half way rest stop, and a lively atmosphere with a start / finish by the the river at the finish venue of the main Thames Path Challenge.

It’s 10 km – as a walk, jog, or run – as an individual or as a team. For the active  young ones – there’s a ‘Kids 2K Walk’ 


Perfect Events for your Team!

High quality, ‘oven ready’ accessible events, with full support & hospitality; excellent value with no set up costs, and will provide an unforgettable bonding experience for your team and boost their wellbeing! With optional enhanced hospitality packages also available – including private gazebos, branding, support vehicles, and accommodation packages – you can make it your own special event. From a group of 6 looking for an active weekend, to companies  with a few hundred colleagues supporting their charity of the year and getting to know each other – there’s an Ultra Challenge® for your team!

Teams can Walk, Jog, or Run 25 km, 50 km or 100 km (+ a few 10k / 10 mile events) and mixing it all up to suit colleagues with a range of fitness is fine! You won’t find more accessible, flexible, sociable, and rewarding events anywhere! Colleagues who are unable to make the big day – can always take on the ‘Virtual Version’!

For 20 years Action Challenge has run events in the UK & Overseas, and have a 1st class record. ‘On Foot’ is much safer than ‘on wheels’ cycling; our events are risk assessed, and operated to the highest standards with medical professionals & qualified mountain leaders involved with safety teams.

We deal with over 500 UK Charities, and Ultra Challenges are perfect events to get colleagues behind  fundraising initiatives for your Charity of the year. We have a range of flexible payment options to make it all easy for you & for your chosen charity.

We provide tailored online registration forms to make colleague sign-up easy, and our dedicated Challenge App communicates all the key information to them – enabling you to focus on recruiting your participants.

For teams of 20+ we can offer discounts, and have a range of payment options to make it easy for bulk payment via invoice, or to collect an agreed registration fee from colleagues, and to involve your chosen charity where applicable.

Whether it’s your own gazebo or marquee decorated with your branding at the start – or perhaps overnight camping for your colleagues – or group transport up to the event – we can tailor a hospitality package to turn your Ultra Challenge® into your own special company event!

Your Team will have a fantastic, inclusive experience on an Ultra Challenge®. For many it will also kick start a more active life-style, and others will come back more motivated – and all will understand fellow colleagues better.  


SEP 2023

Sat 23

Chiltern 50
Ultra Challenge®

Our end of season challenge takes in some of the best of the wonderful Chilterns countryside, with historic trails, nature reserves, forests, and a few hills with fantastic views. Starting & finishing at our basecamp near Henley on Thames, there’s a Saturday night celebration BBQ, bar & entertainment, with extensive on-site weekend camping & parking options. 

A great way to end the season, with extra hospitality to turn it into a celebration. The route will surprise some as it’s rural, scenic, and varied – and all quite close to London & accessible. Why not join us? 

– 50 km – to Henley and on to Lewknor at half way. Nature reserves, Chiltern Hills, great views, and back to the Henley basecamp.

– 25 km – There’s a loop via The Thames & Henley, with a rest stop, and back to basecamp for a BBQ. Note – Ist & 2nd Half of full 50 km route are also available options.

– Chiltern 10K – a fantastic looped route from our Basecamp area up into the surrounding woodland & hills on the estate trails – with fantastic views.

Virtual Challenge – perfect for friends & family to get involved – or anyone who’s up for a challenge!

– Transport – we have a range of pre & post challenge bus transfers & parking options to make it easy for you to join!

Camping –  packages available at the Henley Showground start / finish basecamp.

Our Charity Partners

We work with a wide range of fantastic charities, which benefit from the annual £7+ million of Ultra Challenge fundraising. Our Series Partners and Challenge Partners are some of the UK’s major national & regional charities. Choose to fundraise for one of these ‘Official Partners’ – and it’s 50% OFF the normal charity sponsorship Reg Fees. We also have 50 or so ‘Associate Partners’ (with 25% OFF normal charity Reg Fees) AND 300+ other ‘listed’ charities involved that you can choose to support.

50% ofF charity sponsorship REG FEE



25% ofF charity sponsorship REG FEE



or fundraise for over 300+ others

16 Amazing Challenges

175,000 or so adventurers have taken on an Ultra Challenge® so far, and the 16 unique events make up the UK’s biggest & best series of treks & trail runs – which have also raised £50+ million for charities. Whichever challenge you choose, you’ll get full support all the way so you can set a new goal, enjoy the British countryside, and push yourself further on an inspirational event.

There’s one autumn Challenge left – and all 2024 events are open for sign-up.


Lake District Ultra Challenge

8-9 June 2024

100 km loop + Half & Quarter Challenge options & Ambleside 10K


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Isle of Wight Ultra Challenge

5-6 May 2024

106 km ‘Full Island’ Loop + Half & Quarter Island options.


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London 2 Brighton Ultra Challenge

25-26 May 2024

100 km + Half & Quarter Challenge distance options


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South Coast Ultra Challenge

7-8 Sept 2024

100 km + Half & Quarter Challenge options


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Jurassic Coast Ultra Challenge

18-19 May 2024

100 km + Half & Quarter Challenge options AND Marathon + Double Marathon & Bridport 10K


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Thames Path Ultra Challenge

14 – 15 Sept 2024

100 km + 3/4 + Half & Quarter Challenge options

+ Thames Bridges 25km Trek (Sat – Central London)

+ Friday Moonlight 10K Walk (Central London)

+ The Henley 10K (Sunday)


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South West Coast 50 Ultra Challenge

3 August 2024

50 km Loop + 25 km & 10 km Challenge options


7 of 14

Peak District Ultra Challenge

6-7 July 2024

100 km Loop + Half & Quarter Challenge options & The Bakewell 10 Mile. 


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Cotswold Way Ultra Challenge

22 – 23 June 2024

100 km + Half & Quarter Challenge options.


9 of 14

Chiltern 50 Ultra Challenge

23 Sept 2023

50 km Loop + 25 km & 10K Challenge options


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North Downs 50 Ultra Challenge

27 July 2024

50 km Loop + 25 km & 10km Challenge options.


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Easter 50 Ultra Challenge

Sat 6 April 2024

50 km 0r 25 km Loops 


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London Summer Walk

Sat 24 August 2024

25 KM or 10 KM looped route – Woolwich Start / Finish


13 of 14

London Winter Walk

27 & 28 Jan 2024

Full Marathon, Half Marathon or 10K options. Start / finish – The Oval Cricket Ground – looped routes


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About us

For over 20 years we have organised inspirational challenge events and unforgettable adventures, in the UK and Worldwide for individuals to join – and for private groups, companies, and charities. Our events have also helped to raise over £100 million for charities. Whether it’s 25 km along the Thames Path, cycling in Cambodia, or summiting a snow capped Himalayan Peak – we have a challenge for you!


Full Details of our 2023 Ultra Challenge® Series

You can fundraise for over
300 different charities...

Battersea Dogs & Cats Home
Blue Cross
Borneo Orangutan Survival UK
Cats Protection
Compassion in World Farming
David Shepherd Wildlife Foundation
Dogs for Autism
Dogs For Good
Dogs Trust
Ferne Animal Sanctuary
Foal Farm Animal Rescue (Friends of Animals League)
Helping Rhinos
IAPWA (International Aid for Protection & Welfare of Animals)
LionAid Ltd.
Raystede Centre for Animal Welfare
RSPCA Isle of Wight
Senior Staffy Club
Shark Trust
The Mare and Foal Sanctuary
Wadars Animal Rescue
Whale and Dolphin Conservation
Wildlife Vets International
World Land Trust

Abby’s Heroes
Action Bladder Cancer UK
Action Kidney Cancer
Against Breast Cancer
AMMF – The Cholangiocarcinoma Charity
Anthony Nolan
Blood Cancer UK
Bone Cancer Research Trust
Bowel Cancer UK
Brain Tumour Research
Breast Cancer Now
Cancer Research UK
Children with Cancer UK
Children’s Cancer and Leukaemia Group
Ellen MacArthur Cancer Trust
Follicular Lymphoma Foundation
Future Dreams Breast Cancer Charity
Guy’s Cancer Charity
HASAG Asbestos Disease Support
Hope for Tomorrow
Jo’s Cervical Cancer Trust
Kidney Cancer UK
Leukaemia Care
Leukaemia UK
Lingen Davies Cancer Fund
Look Good Feel Better
Lymphoma Action
Macmillan Cancer Support
Marie Curie
Mesothelioma UK CIO
Myeloma UK
Pancreatic Cancer Research Fund
Pancreatic Cancer UK
Paul Strickland Scanner Centre
Prostate Cancer Research
Prostate Cancer UK
Rowan Tree Cancer Care
Roy Castle Lung Cancer Foundation
Sarcoma UK
Shine Cancer Support
Team Verrico
Teenage Cancer Trust
Teens Unite Fighting Cancer
The Bowel Movement
The Brain Tumour Charity
The Christie Charity
The Eve Appeal
The Fitness Support Network
The Institute of Cancer Research
The Jay C Trust
The Prostate Project
The Robin Cancer Trust
The Royal Marsden Cancer Charity
The Urology Foundation
Walk the Walk
Willow Foundation
World Cancer Research Fund

A-T Society
Access Sport
Amy Winehouse Foundation
Bidwell Brook Special School
Buttle UK
Cardiac Risk in the Young
Cardinal Hume Centre
Child Bereavement UK
Children’s Burns Trust
Children’s Burns Trust
CHUMS Charity
Claire House Children’s Hospice
Costa Foundation
Daisy’s Dream
Diamond Kite Foundation
Diverse Abilities
Dreams Come True
Evelina Children’s Heart Organisation Limited (ECHO Charity)
Evelina London Children’s Charity
Family Action
Family Holiday Charity
Friends and Families
Friends Association of Barford School (FABS)
Great Ormond Street Hospital Children’s Charity
Grief Encounter
Harry’s Rainbow Charitable Trust
Home-Start Elmbridge
Home-Start UK
Home-Start Watford and Three Rivers
Hope for Children
It’s Never You
Jamie’s Farm
John Thornton Young Achievers Foundation
KEEN London
Knight Foundation
Live Luke’s Dreams
Making The Leap
Missing People
Momentum Children’s Charity
Morehall Primary School PTFA
Mosaic – Supporting Bereaved Children
MYTIME Young Carers
National Bobath Cerebral Palsy Centre
National Deaf Children’s Society
Neuroblastoma UK
Open Arms Malawi
Pied Piper Appeal
Railway Children
Rainbow Trust Children’s Charity
Rainbows Hospice for Children and Young People
Rockinghorse Children’s Charity
Ronald McDonald House Charities
Safe Families for Children
Sebastian’s Action Trust
Shooting Star Children’s Hospices
Simon Says
Skylarks Charity
Small Steps
Smile Train UK
Spinal Muscular Atrophy UK
Starlight Children’s Foundation
Swings & Smiles
The Atlas Foundation
The Billington Foundation
The Brompton Fountain
The Childhood Trust
The Children’s Society
The Forest of Dean Children’s Opportunity Centre
The Grand Appeal
The Lexi May Trust
The Mulberry Bush
The Ruth Strauss Foundation
The Sandcastle Trust
The Sick Children’s Trust
Tiny Tickers
Tree of Hope
War Child UK
When You Wish Upon a Star
White Lodge
Winston’s Wish
Wishes 4 Kids
Young Epilepsy
Young Lives vs Cancer

B.Supreme Ltd
CoachBright Charitable Trust
Cotswold Riding for the Disabled
Down Syndrome UK
Friends of the Caribbean
Greenacres Education Trust
Greenacres Education Trust
Healthy Living Centre Dartford
KASBAH (Kent Association for Spina Bifida and Hydrocephalus)
Maddys Mark
National Literacy Trust
Nexus Institute of Creative Arts
Sussex Cricket Foundation
Teach First
The Fortune Centre Of Riding Therapy
The Talent Tap
Time and Talents
Tz Rising
WAM Youth

Brake the road safety charity
Just One Ocean

Acorns Children’s Hospice
Alexander Devine Children’s Hospice Service
Arthur Rank Hospice Charity
Ashgate Hospice
Chestnut Tree House Children’s Hospice
Children’s Hospice South West
Cornwall Hospice Care
Cynthia Spencer Hospice
Demelza Hospice Care
East Anglia’s Children’s Hospices
East Cheshire Hospice
Farleigh Hospice
Forest Holme Hospice Charity
Francis House Children’s Hospice
Harlington Hospice
Haven House Children’s Hospice
Havens Hospices
Helen & Douglas House
Hospice in the Weald
Hospice UK
Hospices of Hope
Isabel Hospice
Jessie May
Julia’s House
Katharine House Hospice – Banbury, Oxfordshire
Keech Hospice Care
Lewis-Manning Hospice Care
Michael Sobell Hospice Charity
Naomi House & Jacksplace
Oakhaven Hospice
Oakhaven Hospice
Phyllis Tuckwell Hospice Care
Pilgrims Hospices
Rowans Hospice
Royal Trinity Hospice
Salisbury Hospice Charity
South Bucks Hospice
St Barnabas House
St Christopher’s Hospice
St Helena Hospice
St Luke’s Hospice (Harrow and Brent)
St Lukes Hospice (Basildon & Thurrock)
St Michael’s Hospice – Hastings and Rother
St Peter & St James Hospice
St Peter’s Hospice
St Raphael’s Hospice
St Wilfrid’s Hospice (Eastbourne)
Sue Ryder
Thames Hospice
The Hospice of St Francis
The Myton Hospices
Weldmar Hospicecare
Willen Hospice
Winchester Hospice
Woking & Sam Beare Hospices

Addenbrooke’s Charitable Trust
Birmingham Children’s Hospital Charity
Birmingham Women’s Hospital Charity
Brighter Futures GWH
Bristol & Weston Hospitals Charity
Countess of Brecknock Hospice Trust
Friends of Danetre Hospital
Guy’s & St Thomas’ Charity
Imperial Health Charity
LIBRA – The Lions International Blood Research Appeal
Oxford Health Charity
Oxford Hospitals Charity
RNOH Charity – The Royal National Orthopaedic Hospital
Royal Free Charity
Southampton Hospital Charity
Spread a Smile
St Georges Hospital Charity
St Marks Hospital Foundation

Action for M.E.
Action for Pulmonary Fibrosis
Action Medical Research
Age UK Wandsworth
Air Ambulance Charity Kent Surrey Sussex
Alcohol Change UK
Allergy UK
Alzheimer’s Research UK
Alzheimer’s Society
Asthma + Lung UK
Ataxia UK
Bowel Research UK
Brain Tumour Support
British Heart Foundation
British Liver Trust
British Skin Foundation
Burning Nights CRPS Support
Cardiomyopathy UK
Cavernoma Alliance UK
Centre for ADHD & Autism Support
Certitude Support
Cianna’s Smile
Coeliac UK
Crohn’s & Colitis UK
Darby Rimmer MND Foundation
Dementia UK
Different Strokes
Dorset and Somerset Air Ambulance
Down’s Syndrome Association
Duchenne UK
East of England Ambulance Service NHS Trust Charitable Funds
Encephalitis Society
Endometriosis UK
Epilepsy Action
Epilepsy Research UK
Epilepsy Society
Facial Palsy UK
Fight for Sight
Fletchers Foundation
Friends of Breathe Arts Health Research
Group B Strep Support
Guide Dogs
Guild Care
Hampshire and Isle of Wight Air Ambulance
Hampshire Medical Fund
Harrow Shopmobility
Harry’s Hydrocephalus Awareness Trust
Headway Surrey
Hearing Dogs for Deaf People
Hertfordshire Independent Living Service (HILS)
Huntington’s Disease Association
Ichthyosis Support Group
Kidney Care UK
Kidney Research UK
Klinefelter’s Syndrome Association
Lincs & Notts Air Ambulance
Little Hearts Matter
London’s Air Ambulance
Macular Society
Magpas Air Ambulance
Medical Detection Dogs
Melanoma Focus
Meningitis Now
Moorfields Eye Charity
Motor Neurone Disease Association
MPS Society
MS Society
MS Trust
Multiple System Atrophy Trust
Muscular Dystrophy UK
My Name’5 Doddie Foundation
National Autistic Society
National Kidney Federation
National Rheumatoid Arthritis Society
Nephrotic Syndrome Trust (NeST)
Neuroendocrine Cancer UK
Northamptonshire Health Charity
Nystagmus Network
Overcoming Multiple Sclerosis
PAPYRUS Prevention of Young Suicide
Parkinson’s UK
PKD Charity
Pregnancy Sickness Support
Prevent Breast Cancer
PSP Association
Retina UK
Reverse Rett
Royal Hospital for Neuro-disability
Sands, Stillbirth & Neonatal Death Charity
Scleroderma & Raynaud’s UK
Stroke Association
Terrence Higgins Trust
The Brain Charity
The Cure Parkinson’s Trust
The Haemophilia Society
The Lily Foundation
The Lullaby Trust
The Meath Epilepsy Charity
The National Brain Appeal
The Pituitary Foundation
The Sickle Cell Society
The UK Mastocytosis Support Group
Thrombosis UK
Thyroid UK
TSA (Tuberous Sclerosis Association)
UK Infantile Spasms Trust
UK Sepsis Trust
University of Birmingham
Versus Arthritis
Wellbeing of Women

Amy Winehouse Foundation
Be Me Project
BHT Sussex
Buckinghamshire Mind
CALM – Campaign Against Living Miserably
Charlie’s Star Charity
Cruse Bereavement Support
Doctors In Distress
Dorset Mind
Eden’s Trust
Edward’s Trust
Essex Recovery Foundation
Flint House
Home-Start Spelthorne
Kaleidoscope Plus Group
Lambeth and Southwark Mind
Libraries Unlimited
Maddie’s Miracle
Marah Trust
Max Windle Memorial Trust
Mental Health Foundation
Mental Health Research UK
Mental Health UK
Mosaic Clubhouse
MQ Mental Health Research
Music for my Mind
Newton Community Centre
Oscar’s Wish Foundation
PACT for Autism
PANDAS Foundation
Petals – The Baby Loss Counselling Charity
PTSD Resolution
Retail Trust
Rethink Mental Illness
Seed – Eating Disorder Support Service
South East and Central Essex Mind
Sunflowers Suicide Support
Survivors of Bereavement by Suicide
Teens in Crisis (TIC+)
The Cares Family
The Healing Hubs
The Lashes Foundation
The Link Visiting Scheme
The Lucy Rayner Foundation
The Survivors Trust
Tibbs Dementia Foundation
Transform Housing & Support
West Sussex Mind

ABF The Soldier’s Charity (South West)
Blesma, The Limbless Veterans
Care for Veterans
Combat Stress
Head Up Charity
RBLI – Royal British Legion Industries
Royal Air Forces Association
Royal Navy and Royal Marines Charity
Scotty’s Little Soldiers
SSAFA, the Armed Forces charity
Taxi Charity for Military Veterans
The Block Armed forces community advice and crisis support cic

1001fontaines UK
Able Child Africa
ActionAid UK
African Adventures Foundation
Dig Deep
Farm Africa
Frank Water
Go MAD in Tanzania
Medecins Sans Frontieres UK
New Futures Nepal
Refugee Action
Refugee Support Europe
Release International
SALVE International
The Boo Charity
Turkey Mozaik Foundation

Age UK Enfield
Age UK Medway
Amnesty International UK
Ben – Motor & Allied Trades Benevolent Fund
British Red Cross
Care of Police Survivors (COPS)
Centre for Women’s Justice
Christian Solidarity Worldwide (CSW)
Christians Against Poverty
Crisis UK
Essex & Herts Air Ambulance
Family Fund
Friends of Essex and London Homeless
Glass Door Homeless Charity
hope for food
Humankind Charity
Hyde Charitable Trust
Immanuel United Reformed Church
Independent Age
Lighthouse Construction Industry Charity
London City Mission
Octavia Foundation
P3 Charity
Providence Row
Rainy Day Trust
Solace Women’s Aid
St Giles Trust
St Mungo’s
Thames Valley Air Ambulance
The Ehlers-Danlos Support UK
The Fire Fighters Charity
The Hummingbird Refugee Project
The Lockton Charitable Association
The Trussell Trust
Ukraine to Chilterns
WAY Widowed and Young
Women’s Aid Federation of England