UK’s #1 Series of treks & trail runs for a wide range of ages, experience and fitness levels. Choose your challenge distance, and do it at your pace. There’re 19 events to choose from, and our support enables you to go further, whilst enjoying the great outdoors, the camaraderie, new friendships, and the challenge!
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, up for more of life’s real challenges – and, maybe, personal horizons redefined!
Good preparation is the key – and from the moment you sign up you’ll have access to a Challenge App – with training guides & videos, maps, the Facebook Club, and the latest news & updates.
As you’ve signed up as a fundraiser, you’ll get full support from the charity’s team to ensure that you smash the targets in good time! The charity will communicate directly with you – and all fundraising goes to the charity via an online JustGiving sponsorship page that you must set up as advised.
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! There is marquee cover, large medical & welfare tents, catering services, plenty of clean toilets, seating, supporter areas, baggage transfer options, and a friendly welcome!
Hundreds 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.
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!
Keeping you well fed & hydrated is key. We pride ourselves on the quantity & quality of our catering, and meals, snacks & drinks are included! You won’t go hungry on an Ultra Challenge®!
We have experienced Doctors, Paramedics, First Aiders, Podiatrists, and Massage Teams at Rest Stops. There are also ‘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 finishers meal, 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). Many of the events have a range of camping options (either beforehand at the start, or / & at 50 km).
Check out the ‘Bookable Extras’ for details of all options.
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 500 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’.
Whether you’re a walker and new to challenge events, an experienced trekker, a marathon enthusiast upping the distance, or a seasoned trail runner out for a sharp time – there’s an Ultra Challenge® for you! Walk, Jog, or Run at your pace, as an Individual or a Team, and fundraise for your favourite charity.
There’s a NEW Ultra Trailblazerz® for faster runners, and an Ultra March® option for ‘hasty hikers’ – plus a friendly ‘Solo Challenger’ start time to join up with others. An Ultra Challenge® will be fun, friendly, safe, & rewarding – with full support all the way, enabling you to push yourself further in wonderful scenery.
Sign up from just £10!
+ Multi Deal Payment Plan
ENDS MIDNIGHT SUNDAY 3OTH NOV
Sign up online below – confirm the distance you’ll take on; whether you intend to walk, jog, or run; choose a funding option which suits you – and pay the appropriate Registration Fee.
You’ll get a Confirmation Email, which includes a link for you to set up your online JustGiving sponsorship page. You’ll also get access to the ‘Challenge App’ which holds all the details about the event.
If you’re up for a faster challenge – check out the ULTRA MARCH® option for walkers, and the new TRAILBLAZERZ™ category for fast runners. There’s also a Solo Challengers Start Time if you want to meet up with others!
Choose how you want to join the Challenge with an associated minimum fundraising target. Sign up via that option and its online Registration Form. Then enter your Personal Details.
Confirm the distance you’ll take on (eg: Full ~100km / Half ~50km / Quarter ~25km / 10km etc) and then select a provisional Start Time slot (actual start times are confirmed 4 weeks prior to the event; for Teams, it will be as per the Team Captain’s choice).
The ‘ULTRA MARCH®’ & ‘TRAILBLAZERZ™’ categories for 100 km & some 50 km distance options – can be selected on the Registration Form (with a specific start time for each).
SOLO CHALLENGERS – if you sign up on your own, and would like to meet others, you can choose this start slot if you wish to (via the Reg Form).
Everyone has to register via a form (ie all team members), as we require personal details, medical info, & declarations.
Within the form you can choose to ‘CREATE’ or ‘JOIN’ a TEAM.
Teams can be of any size; members can opt for the same or different funding options, charities, or distances.
For WALKERS looking to achieve a sub 24 hour total time for 100 km or sub 12 hours for ~50 km (if applicable). There’s a dedicated Start Time – and you’ll join in with ~200 or so other ‘Marchers’!
TRAILBLAZERZ® is a NEW category for the faster, ambitious runners – who will head out in the 1st start wave onto the fantastic, fully signed, Ultra Challenge® routes – with 100 km & 50 km options across 16 events.
TRAILBLAZERZ® may be seasoned Ultra competitors , regular trail runners, or marathon & 1/2 marathon’ers stepping on to the trails & upping the distance. All will probably have an eye on the clock – some will be out for a personal best – and a few will have a crack at the course records, with trophies & prizes at stake!

All sponsorship goes direct to the Charity via your JustGiving page.
At least 50% of the ‘sponsorship target’ should be with the Charity 3 weeks prior to the Challenge. At this time the Charity agrees to pay a Fee for your place to the Organiser (similar to the Self Funding cost – or half of it for Mixed Funding as you’ve already covered half).
Failure to meet the deadline may result in cancellation of your place by your charity.
The remaining 50%, and any extra, should be with your Charity by 4 weeks after the Challenge.

Select your Option below to start the sign-up process. Reg Fees are paid online & Fundraising goes to the charity via an online JustGiving sponsorship page that you MUST set up (look for the link within the ‘Confirmation Email’ you’ll receive).
With ‘Full Sponsorship’ (option 1) – you get up to 50% OFF the ‘standard’ reg fees below!
Pay a small Registration Fee & Fundraise for a chosen Charity (who pay for your place)
£50 Reg Fee & at least
£575 fundraising/sponsorship
£45 Reg Fee & at least
£475 fundraising/sponsorship
£40 Reg Fee & at least
£375 fundraising/sponsorship
£30 Reg Fee & at least
£275 fundraising/sponsorship
£15 Reg Fee & at least
£150 fundraising/sponsorship
Pay for half your place cost & fundraise less for Charity (who pay half of your place cost)
£110 Reg Fee & at least
£330 fundraising/sponsorship
£90 Reg Fee & at least
£270 fundraising/sponsorship
£75 Reg Fee & at least
£225 fundraising/sponsorship
£50 Reg Fee & at least
£150 fundraising/sponsorship
£25 Reg Fee & at least
£100 fundraising/sponsorship
Pay for your place & fundraise whatever you can for a Charity (small admin fee to charity)
£199 Fee paid online &
fundraise whatever you can
£169 Fee paid online &
fundraise whatever you can
£139 Fee paid online &
fundraise whatever you can
£89 Fee paid online &
fundraise whatever you can
£49 Fee paid online &
fundraise whatever you can
NOTE – The registration system provider is Active Network – you’ll need to create an account, or log into an existing one as you register. All Reg Fees are paid online. A 4% Platform Booking Fee applies to all transactions.
We do have a range of additional optional extras designed to make the planning for, and joining, your challenge easier. Sign-up to your chosen Challenge first – and you can then book any optional extras later / separately.
You must be 18 or over (on the day of the challenge) if taking on a Full Challenge (~100km) or Three Quarter Challenge (~75km); 16+ and accompanied by an adult if taking on a Half Challenge (~50km ), 14+ and accompanied by an adult if taking on a Quarter Challenge (~25km) or Marathon); for a Half Marathon aged 12+ and accompanied by an adult; and finally 8+ & accompanied by an adult for a 10km/mile Challenge.
Under 18s taking part must be signed up by someone over 18.
You’ll receive a ‘transaction receipt’ (via email) along with a Confirmation Email welcoming you, and detailing any next steps, timelines you need to be aware of, and how & where to find all the info / details you’ll need for your Challenge. (NOTE– If you don’t receive that e mail within 12 hours, please check your spam/junk mail folders)
You can expect to hear from your charity within 14 days. If for some reason you do not hear from them – please contact them directly, and also email us at charity@actionchallenge.com & we will follow up with the charity for you.
We ensure that registered teams are assigned the same start wave (where distance/challenge option allows), and your team name will be printed onto your bib.
There are no restrictions on our regular teams – you can be any mixture of charities / distances / funding types (i.e. Self Funding, Charity Sponsorship or Mixed Funding), and can have any number of members. (even 2).
Even if you are not fundraising for the same charity, you can still create a challenge team with us.
Whilst you are signing up and registering for your challenge – in the TEAM INFO section (towards the end of the registration questions), you will be asked if you would like to ‘Join a team’ or ‘Create a team’.
If selecting to create a team, you will be asked to create a Team Name and Password. Subsequent team members can then register and select to join your team, and will need to provide the team password in order to join it.
Yes – as long as you are fundraising for the same charity, you can create a team fundraising page on Just Giving (we recommend letting your charity know this is how you will be fundraising together). However, please be advised that the minimum fundraising targets remain per person (not per team), so you will need to reach the combined total fundraising amount on your page for your group.
If you are entering on a Charity Sponsorship or Mixed Funding place then NO – you must select one prime charity for your fundraising. This is because your charity will be paying for a portion of your place on the event (out of the fundraising that you generate). If you wish to also fundraise for another charity, you can do so on your own terms but only as long as you reach the minimum fundraising target your first/prime charity.
If you join as ‘Own Place Charity Fundraising’ however, you have complete flexibility on who you fundraise for – with no targets or deadlines.
All sponsorship goes direct to the Charity via your online JustGiving page – WHICH YOU MUST SET UP.
At least 50% of the ‘sponsorship target’ should be with the Charity 3 weeks prior to the Challenge. At this time the Charity agrees to pay a Fee for your place to the Ultra Challenge Organiser (similar to the Self Funding cost – or half of it for Mixed Funding as you’ve already covered half).
Failure to meet the deadline may result in cancellation of your place by your charity.
The remaining 50%, and any extra, should be with your Charity by 4 weeks after the Challenge.
All charity sponsorship and mixed funding places close 4 weeks before each challenge, so that you have enough time to fundraise and reach your target. Self funding places close for online registration on the Tuesday before each challenge.
Visit the ‘HELP CENTRE’ on the Ultra Challenge Website:
If you still need additional help or guidance – you can contact the Ultra Challenge Team at:
Tel: 0207 609 6695
Over 225,000 adventurers have taken on an Ultra Challenge®, and the 19 events make up the UK’s biggest & best series of treks & trail runs – which also raises £12+ million / year for charities.
Whichever challenge you choose, you’ll get full support all the way so you can set a new goal, enjoy the wonderful countryside & friendly community, fundraise for you favourite charity – and achieve something to be proud of!
If you’re up for a challenge – make it an Ultra Challenge®.
Our Chale start looks over the dramatic coastline to the west, and the route follows the coast with ups & downs around past the ‘Needles’. Then it’s northwards to the halfway in historic Cowes – a welcome stop where a hot meal & a massage awaits. We head around to Ryde, Bembridge, and another major rest stop at Culver Down for some hot food – before the final stretch back into Chale. An epic Challenge!
106 km & ~1800 metres
Every 10-15km under marquees with support – toilets, massage, changing rooms, medics, rest areas, hot drinks, water & snacks & much more.
There’s optional parking & pre or post Challenge shuttle bus transfer services, to make it easy to join & exit. These include:
Chale – Friday Evening
There’s the ULTRA MARCH®category for walkers aiming to do 100 km in less than 24 hours (or 50 km in under 12 hrs). 8.30am start.

For 2026, there’s ULTRA TRAILBLAZERZ® for faster, competitive, runners with an eye on the clock and a ‘time goal’ of sub 13 hrs (male) & 14 hrs (female) for 100km+ on this Challenge. 6.45 am start.

Ultra Challenge® 50 km and 100 km events are fully ITRA-certified and officially recognised as UTMB Index races. 4 ITRA points available.
Day 1 – 52 km & ~900 metres
Day 2 – 54 km & ~900 metres
Day 1 – Saturday
Day 2 – Sunday
Every 10-15km under marquees with support – toilets, massage, changing rooms, medics, rest areas, hot drinks, water & snacks & much more.
There’s a full range of optional parking & pre or post Challenge shuttle bus transfer services, to make it easy to join and exit – and to provide flexible options for your planning. These include:
Chale – Friday evening
Cowes – Saturday evening
Ultra Challenge® 50 km and 100 km events are fully ITRA-certified and officially recognised as UTMB Index races. 2 ITRA points available each day.
See the full 106 km route and all the Island’s spectacular scenery views in daylight! There’s a camping option at the Cowes halfway for rest recovery – or book a local B&B if that’s more your style, and with a camp option at Chale on Friday also you can turn your challenge into an adventure! On Sunday as the sun starts to rise we set out on the 2nd half – all the way back to Chale, where it all began!
A perfect choice if you’ve done a Half Challenge before – and want to ‘up’ the distance without committing to a ‘Full’ option. The route is 3/4 of the Full Challenge – so starts at the Chale basecamp, heads around the fantastic southern section – on to Cowes, and then a final quarter to a finish line at Culver Down after a tough 82 km – with its stunning views over to Sandown & Shanklin beaches. Do it as a ‘continuous’ challenge – OR rest overnight after the 1st 52 km & camp at our Cowes basecamp (or hotel/ B&B) – and do the remaining quarter on Sunday morning – with plenty of time to then travel home!
82 km & ~1300 metres
Every 10-15km under marquees with support – toilets, massage, changing rooms, medics, rest areas, hot drinks, water & snacks & much more.
There’s optional parking & pre or post Challenge shuttle bus transfer services, to make it easy to join & exit. These include:
Chale – Friday evening
Cowes – Saturday evening
52 km & ~900 metres
Every 10-15 km under marquees with support – toilets, massage, changing rooms, medics, rest areas, hot drinks, water & snacks & much more.
There’s a of optional parking & pre or post Challenge shuttle bus transfer services, to make it easy to join and exit – and to provide flexible options for your planning. These include:
Chale – Friday evening
OR/ AND – Cowes – Saturday (camping also available Friday evening – with morning shuttle to start)
There’s the ULTRA MARCH®category for walkers aiming to do 100 km in less than 24 hours (or 50 km in under 12 hrs). 8.30am start.

For 2026, there’s ULTRA TRAILBLAZERZ® for faster, competitive, runners with an eye on the clock and a ‘time goal’ of sub 6 hrs (male) & 6.5 hrs (female) for 50km+ on this Challenge. 6.45am start.

Ultra Challenge® 50 km and 100 km events are fully ITRA-certified and officially recognised as UTMB Index races. 2 ITRA points available.
The first half of the Isle of Wight is stunning! Starting from Chale, you will take on 52 km along this scenic section of the Island. Setting out across the areas of natural beauty with great viewpoints from the southern cliffs to the Needles, you’ll climb 900 m, with stops along the way to keep you energised! Your finish line is at historic Cowes, where a big celebration, a medal, a sit down & hot meal awaits!
54 km & ~1000 metres
Every 10-15km under marquees with toilets, changing rooms, medics, rest areas, hot drinks, water & snacks and much more.
There’s a full range of optional parking & pre / post Challenge bus transfer services to make it easy to join and exit. These include:
Chale or Cowes – Saturday
A fabulous stretch of the Island’s Coastal Path guiding you via sandy beaches and picturesque old villages. You’ll trek through the resorts of Sandown, Shanklin, and Ventnor on a tough challenge on the wonderful east coast of this terrific Island!
A NEW looped route setting out from the Chale basecamp, that gives you the best of the Island’s dramatic scenery along famous southern coastline to the iconic ‘Needles’ – for a Picnic lunch at halfway. The route then heads up on to the Tennyson Trail and the Worsley Trail with fantastic panoramic views as it loops back to the Chale basecamp. Perfect if you want fantastic scenery – a manageable 50km – and ideal to park at Chale or even camp with us!
50 km & ~ 1025 metres
Every 10-15 km under marquees with toilets, massage, changing rooms, medics, rest areas, hot drinks, water & snacks and much more.
There’s a full range of optional parking & pre or post Challenge shuttle bus transfer services, to make it easy to join and exit – and to provide flexible options for your planning. These include:
See ‘Bookable Extras’ page for full details
Chale – Friday 2 and / or Saturday 3 May
Visit ‘Bookable Extras’ for full details
Our 1st Quarter 25 km Challenge starting from the Chale basecamp gives you the best of the Island’s dramatic scenery along famous southern coastline – finishing near the iconic Needles, for a Picnic lunch. With a 1/4 – there’s plenty of time left for an evening celebration on the Island!
25 km & ~500 metres
Every 10-15km under marquees with toilets, changing rooms, medics, rest areas, hot drinks, water & snacks and much more.
There’s a full range of optional parking & pre or post Challenge shuttle bus transfer services, to make it easy to join and exit – and to provide flexible options for your planning. These include:
Chale – Friday evening
25 km & ~500 metres
Every 10-15km under marquees with toilets, changing rooms, medics, rest areas, hot drinks, water & snacks and much more.
There’s a full range of optional parking & pre or post Challenge shuttle bus transfer services, to make it easy to join and exit – and to provide flexible options for your planning. These include:
Chale – Saturday evening
A fabulous stretch of the Island’s coastline setting out on the Sunday morning from Culver Down – perched high up above the bay with fantastic views. It’s through the resorts of Sandown, Shanklin, and Ventnor (a rest stop here – with snacks & drinks) – before finishing 25 km later at our main basecamp in Chale where a celebration, medal and hot meal awaits.
10 miles – and quite flat
Every 10-15km under marquees with toilets, changing rooms, medics, rest areas, hot drinks, water & snacks and much more.
There’s a full range of optional parking & pre or post Challenge shuttle bus transfer services, to make it easy to join and exit – and to provide flexible options for your planning. These include:
Cowes -Friday evening
Cowes, and its famous marinas, sit on the estuary of the River Madina – and if you’re staying in Cowes – and fancy a bit of a challenge – this could be perfect for you! Starting at our showground basecamp – you’ll follow the trails around the estuary, cross on the chain ferry – and really get a good feel for Cowes and its surrounding area. You finish back at the Cowes basecamp after arewarding 10 mile mini challenge!
Sign up for just £10 …
.. Any Event / Any Distance
CHALE – MAIN START VENUE (0 km) – Friday before your challenge (generally suits Full 106 km, 3/4, 1st Half, 1st Quarter Challengers).
Chale start venue is also the main finish – Saturday night is bookable for ‘fast finishers’ (runners / joggers), ‘Cross Island’ challengers + may suit 4th Quarter Challengers (then transfer back to start early Sun am).
COWES HALF WAY VENUE (53 km) – Friday or Saturday night – works on Friday for ‘Cross Island’ before your challenge or on Saturday for the ‘2 Day Daylight Full 106 km’ option for overnight sleep / recovery – AND also works for ‘1st Half Finishers’ & for the early Sunday morning 2nd Half starters.
ALL-INCLUSIVE PACKAGES OR ‘PITCH ONLY’ OPTION (inc Camper Vans) ARE AVAILABLE
For any additional campers reserve a spot on an already booked Pitch ONLY/Campervan option on our campsite. (Please ensure when booking for extra campers you have already purchased a Pitch ONLY/Campervan space).
Parking for your vehicle is available at :
Shuttle busses to help with your logistics:
After your challenge:
Friday Night Dinner – available to book for anyone staying at Chale (basecamp) on Friday night. Friday Night Dinner – is NOT available on Cowes.
Saturday Morning Breakfast – available to participants beginning their challenge on Saturday morning at Chale (basecamp) NOT at Cowes. Breakfast the following morning is only included in Inclusive camping packages – if you are have booked Pitch only or Campervan you will need to book these separately.
Sunday Morning Breakfast – available to participants beginning their challenge on Sunday morning at the IOW Showground (Cowes) & Chale. Breakfast the following morning is only included in Inclusive camping packages – if you are have booked Pitch only or Campervan you will need to book these separately.
10 Mile Meal – If you have taken part in the Medina 10 Mile there is an option to book a hot meal post challenge
NO NEED TO PRE BOOK – AND IS AVAILABLE ON THE DAY AT YOUR START (Pay cash or Card)