Spectacular World Heritage coastline to take on at your pace as a walk, jog, or run – and fundraise for your favourite charity! A start in Corfe Castle, the route heads to Swanage, through Lulworth Cove, past Durdle Door, with ups & downs to Weymouth halfway. For 100km challengers, it’s past Chesil Beach, with a finish line in the vibrant town of Bridport. With distance options to suit everyone – it’s the event of the year! Join up to 3,000 adventures as an individual or as a team; you’ll get full support all the way, plenty of food & drink, optional camping & transfers, a special medal, T shirt & celebration finish – and a great sense of achievement! Push yourself further in 2026, take on an Ultra Challenge!
UK’s #1 Series of Treks & Trail Challenges – for a wide range of ages, experience and fitness levels. Choose your challenge distance, and do it at your pace. There’re 22 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, and up for more of life’s challenges!
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’.
+ Free Tech T Shirt
+ Free Virtual Challenge
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 as an Individual or a Team, and fundraise for your favourite charity.
There’s an Ultra Trailblazerz® for ambitious 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.
From the new start in Corfe Castle – 100 km, at your pace, through the day & night if you’re walking.
Corfe Castle > Bridport
There’s also the ULTRA MARCH®category for walkers aiming to do 100 km in less than 24 hours (or 50 km in under 12 hrs).

AND – ULTRA TRAILBLAZERZ® for ambitious runners.

100 km over 2 days, with optional camping packages at half way (Weymouth) – or book a hotel / B&B (there’re many in Weymouth) – and rest!
Day 1 – Corfe Castle > Weymouth
Day 2 – Weymouth > Bridport
Corfe Castle > Bridport
Note – this can also be done over 2 days (with camping option at Weymouth)
A scenic & tough ‘half’ Challenge – the best of the Jurassic Coast.
Corfe Castle > Weymouth
There’s also the ULTRA MARCH®category for walkers aiming to do 100 km in less than 24 hours (or 50 km in under 12 hrs).

AND – ULTRA TRAILBLAZERZ® for ambitious runners.

A 42 km ‘marathon’ distance along varied Jurassic coast scenery.
Weymouth > Bridport
A NEW looped marathon route from / back to Weymouth – along the best of the Jurassic Coast route (same price as a ‘Half Challenge’)
Weymouth > Weymouth
A great loop down to sea-side Swanage, along the coast, and back up to Corfe (different venue to start)
Corfe Castle > Corfe Castle
Classic Jurassic – with Lulworth Cove & Durdle Door – and a tough one at 34km with a few hills – but ever so rewarding!
Corfe Castle > Weymouth
Bridport > Bridport
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 quicker challenge – check out the ULTRA MARCH® option for walkers, and the new TRAILBLAZERZ® category for ambitious runners.
Choose how you want to join – and sign up via the online Registration Form.
DISTANCE – confirm what you’ll take on (eg: 100km / Half 50km / Quarter 25km / 10km etc).
PERSONAL DETAILS – provide info as prompted.
YOUR PACE – confirm how you’ll take part (ie: as Walker / Ultra March /Jogger / Runner / or Trailblazerz).
‘ULTRA MARCH’ & ‘TRAILBLAZERZ’ categories available for 100km & most 50km ‘s (with specific start time for each). Check first if suitable for you!
START TIME – select a provisional slot (actual start times confirmed 4 weeks prior to the event). Teams – it’s as per the Team Captain’s choice.
SOLO CHALLENGERS – if you sign up & would like to meet others, there’s a ‘Solo Challengers Start Time’ – (select 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 <12 hrs for 50 km (if applicable). Dedicated Start Time – you’ll join in with ~200 or so other ‘Marchers’

For ambitious RUNNERS with an eye on the clock – out to beat a ‘time goal’.
On 100 km events this ranges from 12 hrs – 15 hrs; for 50 km events 5 hrs – 7.5 hrs (event ‘time goals’ are adjusted for ascent, distance, male/female).
Dedicated Start Time (normally 7am) and you’ll join 300 or so others out on a clear course. For some – trophies, course records & prizes are 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).
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.

Discounts off 2027 Self Fund prices to help families & ‘the young’.
You (participant or parent) will be emailed a DISCOUNT CODE to use at 2027 registration checkout.
Note: Proof of age will be required at the event.
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).
JUST £5 TO SIGN UP – ANY DISTANCE! (Option 1)
Pay a small Registration Fee & Fundraise for your Charity (who then pay for your place)
£5 Reg Fee & at least
£575 fundraising/sponsorship
£5 Reg Fee & at least
£475 fundraising/sponsorship
£5 Reg Fee & at least
£375 fundraising/sponsorship
£5 Reg Fee & at least
£275 fundraising/sponsorship
£5 Reg Fee & at least
£150 fundraising/sponsorship
Pay for your place & fundraise whatever you can (no event place cost for the charity)
£199 Fee paid online &
fundraising 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
£55 Fee paid online &
fundraise whatever you can
NOTE – Our registration system provider is Active Network LLC. You create an account, or log into an existing one, as you register for an event. All Reg Fees are paid online. Their 4% Platform Booking Fee applies to all transactions.
We have a range of optional extras designed to make the planning for, and joining, your challenge easier. Sign-up to your 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
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 and for your charity at your pace. Full support means you can set a goal, and enjoy the wonderful scenery & welcoming event atmosphere.
CORFE CASTLE – MAIN START VENUE (0 km) – Friday night before your challenge. Generally suits Full 100 km, 3/4 Challengers, 1st Half, Marathon & 1st Quarter Challengers + 2nd Quarter with short transfer.
WEYMOUTH HALF WAY VENUE (58 km) – Saturday night – primarily for the ‘2 Day Daylight Full 100 km’ or ‘3/4 Challengers’ option for overnight sleep / recovery – AND also works for ‘1st Half + Marathon Finishers’ & for the early Sunday morning 2nd Half starters.
ALL-INCLUSIVE PACKAGES OR ‘PITCH ONLY’ OPTION (inc Camper Vans) ARE AVAILABLE
For any extra supporters or participants 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 if available at the venue).
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 Corfe Castle on Friday night.
Saturday Morning Breakfast – available to participants beginning their challenge on Saturday morning at Corfe Castle. Breakfast the following morning is included in the inclusive camping packages, but not in the pitch only & will need to be booked separately.
Sunday Morning Breakfast – available to participants beginning their challenge on Sunday morning at Weymouth. Breakfast the following morning is included in the inclusive camping packages, but not in the pitch only & will need to be booked separately.
Bridport 10K Meal – If you have taken part in the Bridport 10k 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)