We’re back on the North Downs with a fabulous challenge starting from beautiful Loseley Hall Basecamp near Guildford. The looped 50km route takes in the best of the Surrey Hills, the North Downs Way and the surrounding countryside, with varied terrain, wonderful scenery and fabulous views across the South.
Easily accessible from London, this is a fantastic summer adventure with full support and hospitality throughout. With 25km and 10-mile options also available, there’s a North Downs Ultra Challenge for you!
Endurance events for a wide range of fitness & ages – and the UK’s #1 series of treks & trail runs. Choose your Challenge – do it at your pace, and there’re 20 events in the Series. Our support enables you to go further, whilst enjoying the great outdoors & camaraderie.
There are marquee rest stops, lots of food & drink, medical & massage teams, with a fully signed route & 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!
Good preparation & smart planning are key to successfully completing an Ultra Challenge. From the moment you sign up you’ll have access to our Challenge App, with training guides, optional training walks & runs, maps, on the day info, and online forums. We will also keep you updated with any news & challenge updates via notifications through the app and emails.
Keeping you well fed & hydrated is key to getting you across that finish line successfully & safely. Whichever distance you are signed up every meal and snack stop is included in your entry so you can expect:
We have Rest Stops every 12.5 km or so with ‘major’ ones at ~25/50/75/100 km. Our Rest Stops are like no others – along side a large medical area and catering services they are all covered infrastructure (to keep you out of the sun or rain!) – here there will be a place to sit down and put your feet up, use any of the facilities (toilets, medics, changing rooms, rest areas, baggage pick up). Manned by our team to help with any query or questions you have!
00’s of pink arrows + glow-sticks (at night) mark the route, and with Google route maps in the App you won’t get lost on an Ultra Challenge®!
Our Timing System scans you at rest stops, with your progress logged and monitored by our Control Room.
For 2025 – we’ve upgraded our system, with an APP for your mobile with GPS Tracking – which you can share in ‘real time’ with family & friends – without draining your phone’s battery – and you also get all the info on the route lying ahead!
Like on many Ultra Challenge events we have camping options for the Friday &/ or Saturday nights. These packages will be detailed on the ‘bookable extras’ page soon!
Keeping you safe and healthy is our upmost priority – we have a vast experienced team of Doctors, Paramedics, First Aiders, Podiatrists and Masseuses available and on hand at every Rest Stop (as well as roaming the route). You will also have access to a ‘self help’ area at every stop with blister plasters, talcum powder & more should you just need tape yourself up!
We don’t ever want you to forget that moment you reached your goal and crossed over the finish line – our Cheer Squad will ensure that you don’t! You will be given a medal, finisher’s t-shirt, glass of fizz and a photo finish! Before being guided to a finishers meal, drinks & a well earned sit down and rest.
We operate shuttles to and from the nearest train station for anyone needing onward travel after their challenge, the majority of our finish lines also have ample parking so your supporters can meet you and pick you up, as well as we will have specific ‘transfers’ back to other locations – check the individual event pages for full details of the services we will be laying on.
Looking for a great event for your team without all the hassle, risk, or costs of organising it? These events are the PERFECT solution – and we had over 400 company teams joining us in 2025.
Your Team will be energised, exercised, bonding & motivated on a fun, accessible, safe, high quality outdoors event. With optional hospitality packages available – make an Ultra Challenge® your company’s special event – maybe supporting your ‘charity of the year’.
+ Free Virtual Challenge
+ 50% OFF Tech T Shirt
+ Multi Deal Split Payment
Whether you’re a walker and new to challenge events, an experienced trekker, a marathon enthusiast upping the distance, or a seasoned ultra runner – 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. Discounts for ages under 25.
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 North Downs 50 Ultra Challenge® is fun, safe, & rewarding – with full support all the way, enabling you to push yourself further in wonderful Surrey scenery – and enjoy a great day out!
Date: Sat 31 July 2027
Start & Finish: Loseley Park, Guildford
Distance & Elevation: 50 km & ~830 m elevatio
There’s also the ULTRA MARCH® category for walkers aiming to do 50 km in less than 12 hours.
NEW for 2026, there’s ULTRA TRAILBLAZERZ for faster, competitive, runners with an eye on the clock. See Challenge Options for details.
Date: Sat 31 July 2027
Start & Finish: Loseley Park, Guildford
Distance & Elevation: 25 km & ~530 m elevation
Follow the North Downs Way to Dorking. Fabulous views!
Date: Sat 31 July 2027
Start: Loseley Park, Guildford
Finish: Milton Court – Nr Dorking
Distance & Elevation: 24 km & ~600 m elevation
Optional bookable bus transfer from finish back to Guildford basecamp.
Date: Sat 31 July 2027
Start & Finish: Loseley Park, Guildford
Distance & Elevation: 10 miles & ~280 m elevation
Pay for your place in full online. Prices vary by distance. Optional fundraising also available.
Pay a smaller Reg Fee online and also commit to fundraise for a cause close to your heart.
50% OFF REG FEES..
Fundraising for a Series Partner
Losley Park Basecamp – MAIN START/FINISH VENUE
Friday night – Ideal for all challengers starting on Saturday morning.
Saturday night – Available for anyone wishing to stay overnight after finishing.
Inclusive Packages and ‘Pitch Only’ options, including campervans, are available.
Parking is available at the Loseley Park Start/Finish Venue.
Limited parking available. Parking is included for those camping.
Enjoy a seamless journey to and from Guildford Train Station, with convenient transfers connecting you directly to our event venue.
Friday Night Dinner
Hot meal served by Extreme Hospitality. Pre-booking required.
Saturday Morning Breakfast
Available to purchase on the day from Extreme Hospitality.
Sunday Morning Breakfast
For those camping at Loseley Park overnight. Pre-booking required.
NO PRE-BOOKING REQUIRED – AVAILABLE ON THE DAY AT YOUR START
Pay by cash or card.
Store your bag safely at Loseley Park.
The UK’s biggest & best series of treks & trail challenges, with over 45,000 taking part in 2027, and aiming to raise £15 million for UK charities.
Choose you Challenge – and do it for yourself, or for charity at your pace. Full support means you can set a goal, and enjoy the wonderful scenery & welcoming event atmosphere. Prices frozen for 2027!
Our SERIES PARTNERS are some of the UK’s major charities. Fundraise for one – and it’s 50% OFF Reg Fees with the Fundraising’Option’.
We also have 60 or so ‘ASSOCIATE’ PARTNERS with 25% OFF standard Reg Fees.
There are also 500+ other ‘Listed’ Charities that you can support.
Choose your Charity – Set up a JustGiving Page – Start Fundraising!
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Birmingham Dogs Home
Born Free Foundation
Byfleet CAT Rescue
Celia Hammond Animal Trust
Dogs for Autism
Dogs Trust
Ferne Animal Sanctuary
Foal Farm Animal Rescue (Friends of Animals League)
Helping Rhinos
Raystede Centre for Animal Welfare
RSPCA SOUTH WEST SOMERSET BRANCH CIO
Wadars Animal Rescue
Abbie’s Army
Abby’s Heroes
Action Bladder Cancer UK
Action Kidney Cancer
Alfie’s Wish
AMMF – The Cholangiocarcinoma Charity
Aurora Breast Cancer Wellbeing
Azaylia Foundation
Brain Tumour Research Campaign
Brainstrust
Cancer Research Wales
CoppaFeel!
Dragonfly Cancer Trust
Ellen MacArthur Cancer Trust
Exeter Leukaemia Fund
Future Dreams Breast Cancer Charity
Guy’s Cancer Charity
HASAG Asbestos Disease Support
Heartburn Cancer UK
Holly’s Heroes
Keeping Abreast
Kids Cancer Charity
Lennox Children’s Cancer Fund
Lingen Davies Cancer Support
Make 2nds Count
Menopause and Cancer
Meredith’s Mission
Mesothelioma UK CIO
Mitchell’s Miracles Charity
Myeloma UK
North West Cancer Research
Olive Tree Cancer Support
Ovacome
Paul Strickland Scanner Centre
Peaches Womb Cancer Trust
PLANETS Cancer Charity
Prevent Breast Cancer
Roy Castle Lung Cancer Foundation
Shine Cancer Support
Solving Kids’ Cancer UK
Team Verrico
Teens Unite Fighting Cancer
The Christie Charity
The Dorset Cancer Care Foundation
The Inflammatory Breast Cancer Network UK
The Institute of Cancer Research
The Prostate Project
The Robin Cancer Trust
The Urology Foundation
Walk the Walk
We Hear You
Wessex Cancer Support
Willow Foundation
Wolo Foundation
ABC Book Club
Able Child
Act4Africa
Adoption UK
AFASIC
Ambition Aspire Achieve
Apart of Me
AT Society
Autism Early Support
Barnardo’s
Barnet Mencap
Be Free Young Carers
Become Charity
Berkshire Youth
BOSP (Brighter Opportunities for Special People)
Cardiac Risk in the Young
CASPA
Challengers
Chance for Childhood
Cherry Trees
Child Brain Injury Trust (CBIT)
Children’s Burns Trust
Children’s Heart Surgery Fund
Coin Street Centre trust
Daisy’s Dream
Dandelion Time
Diabetes Research & Wellness Foundation
Dingley’s Promise
Diverse Abilities
Dreamflight
Dreams Come True
Family Action
George’s Rockstars
Grace Kelly Childhood Cancer Trust
Grief Encounter
Harrys Rainbow
HOPE for Epilepsy
Jamie’s Farm
Jigsaw South East
KEEN London
KEEN London
KidsAid
Learn to Love to Read
Lifelites
Make-a-Wish UK
MCKS Charitable Foundation UK
Merlin’s Magic Wand Children’s Charity
Mermaids
Momentum Children’s Charity
Mosaic – Supporting Bereaved Children
MYTIME Young Carers
National Deaf Children’s Society
NPH UK
Open Arms Malawi
Place2Be
Playskill
Porridge and Pens Ghana
Raise Your Hands
Rays of Sunshine
Rays of Sunshine
Roald Dahl’s Marvellous Children’s Charity
Rockinghorse Children’s Charity
School in a Bag
ScotsCare
Sebastians Action Trust
SeeSaw Grief Support
Simon Says
SKY HIGH TRAMPOLINE GYMNASTICS ACADEMY
Small Steps
Space 2 Be Me
Spinal Muscular Atrophy UK
SSNAP
Stand Against Violence
Standing in the Gap
SUDC UK
Ten Little Toes Baby Bank
The Daisy Garland
The Kids Network
The Sick Children’s Trust
The Smallest Things
The Sussex Snowdrop Trust
Theirworld
Tiny Tickers
Truly Beloved a children’s charity
Unique – Rare Chromosome Disorder Support Group
War Child
Wooden Spoon – The children’s charity of rugby
Brightside
British Exploring Society
Down Syndrome UK
Farms for City Children
Hamelin
M7 Education
National Literacy Trust
RDA (Riding for the Disabled Association)
Sussex Cricket Foundation
The Change Foundation
The Ramblers
The Theatre Chipping Norton
Youth Adventure Trust
Just One Ocean
Marine Conservation Society
SolarAid
World Land Trust
Addenbrooke’s Charity
Arthur Rank Hospice Charity
Blythe House Hospice
Children’s Hospice South West
Cynthia Spencer Hospice
Demelza Hospice Care
Dorothy House Hospice Care
Dove House Hospice
East Anglia’s Children’s Hospices
East Cheshire Hospice
ellenor
Forest Holme Hospice Charity
Francis House Children’s Hospice
Garden House Hospice Care
Harlington Hospice
Haven House Children’s Hospice
Heart of Kent Hospice
Hospice in the Weald
Hospiscare
Julia’s House
Julian House
Keech Hospice Care
LOROS
Michael Sobell Hospice Charity
Mountbatten Isle of Wight
North Devon Hospice
Oakhaven Hospice
Phyllis Tuckwell Hospice Care
Priscilla Bacon Hospice Charity
Prospect Hospice
Rennie Grove Peace Hospice Care
Rowans Hospice
Southern Hospice Group
St Barnabas Hospice
St Christopher’s Hospice
St Clare Hospice
St John’s Hospice, London
St Luke’s Hospice Basildon and Thurrock
St Luke’s Hospice Plymouth
St Michael’s Hospice (North Hampshire)
St Peter & St James Hospice
St Peter’s Hospice
St Raphael’s Hospice
St Wilfrid’s Hospice Eastbourne
St Wilfrid’s Hospice, Chichester
Sue Ryder
Thames Hospice
The Myton Hospices
Wessex Children’s Hospice Trust (Naomi and Jack’s)
Babies in Buscot Support
Barts Charity
Brighter Futures GWH
Bristol & Weston Hospitals Charity
Cheltenham and Gloucester Hospitals Charity
CW+
Dorset County Hospital Charity
East and North Hertfordshire Hospitals Charity
Frimley Health Charity
Guy’s & St Thomas’ Charity
Isle of Wight NHS Trust Charity
King’s College Hospital Charity
LIBRA – The Lions International Blood Research Appeal
Love Musgrove
Mid & South Essex Hospitals Charity
Newcastle Hospitals Charity
Northamptonshire Health Charity
Oxford Hospitals Charity
Portsmouth Hospitals Charity
RNOH Charity
Royal Brompton & Harefield Hospitals Charity
Royal Brompton & Harefield Hospitals Charity
Royal Free Charity
Royal Orthopaedic Charity
Royal Voluntary Service
Somerset NHS Charity
St Georges Hospital Charity
The Oliver Fisher Special Care Baby Trust
UCLH Charity
UCLH Charity Cancer Fund
University Hospitals Coventry and Warwickshire Charity
Whittington Health Charity
Yeovil Hospital Charity
Abigail’s Footsteps
able2achieve Trust
Action for A-T
Action for M.E.
Action for Pulmonary Fibrosis
Action Medical Research
Alcohol Change UK
Allergy UK
Alzheimer’s & Dementia Support Services
Anaphylaxis UK
Animal Free Research UK
Antenatal Results and Choices (ARC) LTD
Arts for Dementia
Ataxia UK
Autism Together
Batten Disease Family Association CIO
Bowel Research UK
Brain Tumour Support
Burning Nights CRPS Support
Cardiomyopathy UK
Cavernoma Alliance UK
Centre for ADHD & Autism Support
Certitude Support
Challenging MND
Chilterns Neuro Centre
CMTUK
CMTUK
Coeliac UK
Colostomy UK
Cure Parkinson’s
Day One Trauma Support
Deafblind UK
DEBRA
Dementia Adventure
Dentaid The Dental Charity
Diabetes UK
Different Strokes
Dorset Search and Rescue
Dyscover – specialist aphasia support
East Kent Mencap
East of England Ambulance Service Charity
Eczema UK formerly known as National Eczema Society
Encephalitis International
Endometriosis UK
EOS Network
Epilepsy Action
Epilepsy Research Institute UK
Facial Palsy UK
Fight for Sight
First Steps ED
Foundation for Prader-Willi Research UK
Friends of Breathe Arts Health Research
Gene People
Gift of Sight – University of Southampton
Great North Air Ambulance Service
Group B Strep Support
Harrow Shopmobility
Headway UK – The Brain Injury Association
HEART UK
Huntington’s Disease Association
Injured Jockeys Fund
Layton Rahmtulla Benevolent Trust
Lincs & Notts Air Ambulance
Macular Society
Magpas Air Ambulance
Matt Hampson Foundation
Medical Research UK
Meniere’s & Vestibular UK
Meningitis Now
Meningitis Research Foundation
Mikaere Foundation
MND Foundation
Moorfields Eye Charity
MPS Society
Multiple Sclerosis Trust
My Name’5 Doddie Foundation
Natasha’s Foundation
National Autistic Society
National Axial Spondyloarthritis Society
National Rheumatoid Arthritis Society
NCBRS Worldwide Foundation
Nephrotic Syndrome Trust (NeST)
Nerve Tumours UK
Neuroendocrine Cancer UK
Nystagmus Network
Pain Concern
PKD Charity
Play2Give
PSC Support
PSP Association
Pumping Marvellous Foundation
Retina UK
Rett UK
Rett UK
SarcoidosisUK
Scleroderma & Raynaud’s UK (SRUK)
Scope
Sense
Shaftesbury
Sightsavers
Smile4Wessex
South Central Ambulance Charity
Spinal Research
St Joseph’s Hospice Hackney
Support Dogs
Terrence Higgins Trust
The Alfie Jones Foundation
The Brain Charity
The Ectopic Pregnancy Trust
The Good Company People
The Lily Foundation
The Lullaby Trust
The Meath Epilepsy Charity
The Migraine Trust
The National Brain Appeal
The National Children’s Air Ambulance
The Stable Family Home Trust
The Sussex Stroke and Circulation Fund
The UK Sepsis Trust
Thrive (Somerset formerly CCs)
Thrombosis UK
TOFS
Tourettes Action
TSA (Tuberous Sclerosis Association)
Victim Support
Wessex Cardiac Trust
Willow Foundation
Your Local Air Ambulance Warwickshire Northamptonshire Derbyshire Leicestershire and Rutland
Action on Postpartum Psychosis
Addiction Family Support
bigmoose
Buckinghamshire and East Berkshire Mind
Carers in Hertfordshire
Choices
CHUMS Charity
Cruse Bereavement Support
Darlington Mind
Dorset Mind
Fine Cell Work
Flint House Police Rehabilitation
Forward Trust
Forward Trust
Grassroots Suicide Prevention
Held In Our Hearts
Help Musicians
It’s Time Charity
MediCinema
Mencap
Mental Health Foundation
Mind in West Essex
Mind Over Mountains
MQ Mental Health Research
Music for my Mind
Music Minds Matter
OCD Action
One in Four (London)
Open Door (Birkenhead)
Petals – The Baby Loss Counselling Charity
PTSD Resolution CIO
PTSD UK
Resolve
Rethink Mental Illness
Richmond Borough Mind
RIPPLE SUICIDE PREVENTION CHARITY
Safeline
Samaritans
SANE
SARSAS (Somerset and Avon Rape and Sexual Abuse Support)
Scarborough, Whitby and Ryedale Mind
Sexual Assault and Abuse Support Service Buckinghamshire and Milton Keynes (SAASSBMK)
Shout
Solent Mind
Sport in Mind
Streetwise Opera
The Brave and Determined Charity
The Burnt Chef Project CIC
The Connection at St Martin-in-the-Fields
The Electrical Industries Charity
The Harmony Centre
The Headlight Project
The Link Visiting Scheme
The Max Windle Memorial Trust
The Mix
The OLLIE Foundation
The Open Door (Taunton)
The Reader
The Survivors Trust
Transform Housing & Support
We Are With You
Younger People with Dementia
Army Benevolent Fund (South West)
Blesma The Limbless Veterans
Care for Veterans
Hounds for Heroes
PTSD Resolution
RAF Association
RMA – The Royal Marines Charity
Royal British Veterans Enterprise
Royal Navy and Royal Marines Charity
Royal Star & Garter
Scotty’s
SSAFA the Armed Forces charity
Who Dares Cares
Action Syria
ActionAid UK
African Children’s Fund
ARTICLE 19
Beyond Ourselves
Challenge Ministries UK
Christian Aid
Concern Worldwide (UK)
Cotswold Fayre Charitable Trust
Frank Water
Humanitas
Médecins Sans Frontières / Doctors Without Borders (MSF)
Mehiel Foundation
Mercy Ships UK
New Futures Nepal
SADAGAAT
SALVE International
STOP THE TRAFFIK
Tibet Relief Fund
Village Africa
Voice of Persecuted Christians
WaterAid
Age UK Bristol
Age UK East London
All People All Places (APAP)
Amnesty International UK
Ben – Motor & Allied Trades Benevolent Fund
Braintree Area Foodbank
Carers UK
Centre for Women’s Justice
Connection Support
Fire Fighters Charity
Framework
Homeless Oxfordshire
Imago Dei
Lambeth & Croydon Foodbank
Lighthouse Construction Industry Charity
New Hope Watford
Oasis Domestic Abuse Service
Refugee Action
Shelter
SPEAR
The Ehlers-Danlos Support UK
The Openwork Foundation
The Princess Project
Transition Homeless Project
Turn2us
Turning Tides
WAY Widowed and Young
Women’s Aid Federation of England
Young Carers Development Trust
50% OFF for a Series Partner Charity…
25% OFF Reg Fee with Associate Partners
Sign up to 2 Events or more in 2027…
Discounts Start at 10% and up to 25% OFF
EG – Choose two 100 km events – SAVE ~£40!
+ MULTI DEAL PAYMENT PLAN OPTION
Great for Training & Getting Active!
4 Challenges to choose from -Details in Email
* T Shirt Deal Excludes 10km & 10 mile Events
Ultra March® is WALKING at a brisk & consistent pace with like minded challengers to hit the time goal. A bit like a ‘march’ – but taking in the great rest stops & services of an Ultra Challenge!
Above the general Ultra Challenge Rules – with an Ultra March® it’s:
Entry category aimed at ambitious runners. At the front with 300 or so competitors of ‘mixed’ experience – with 100 km & 50 km options. For trail runners, marathon participants switching to trails, and ambitious athletic types. Support services, fully signed routes, medics, massage, and rest stops that Ultra Challenges are famous for!
PAY FOR YOUR PLACE IN FULL. NO CHARITY INVOLVEMENT - BUT YOU CAN CHOOSE TO FUNDRAISE FOR A CHARITY IF YOU WISH.
£139 Reg Fee paid online
£89 Reg Fee paid online
£55 Reg Fee paid
MULTI DEAL - for 2+ events - Up to 25% OFF
YOUNG PERSON - 20% OFF for ages 24 or less & 50% OFF for ages 16 or less (+ min age)
* Conditions apply
PAY A REG FEE & FUNDRAISE FOR A CHARITY OF YOUR CHOICE. FUNDRAISING TARGETS & TIME DEADLINES APPLY (50% of the MINIMUM DUE 3 WEEKS PRIOR). THE CHARITY THEN PAYS FOR YOUR PLACE.
£40 Reg Fee & at least
£375 Fundraising/Sponsorship
£30 Reg Fee & at least
£275 Fundraising/Sponsorship
£15 Reg Fee & at least
£150 Fundraising/Sponsorship
Series Partners - 50% OFF above Reg Fee!
Associate Partners - 25% OFF above Reg Fee
