- Sat 18 Apr 2026
08:30
Age 14 & over
£89
- 25 km trail running + 175 m ascent
Event overview
Thousands of adventurers have taken on the Windsor 50 Ultra Challenge® - part of the UK’s biggest and best series of treks and trail runs for a wide range of ages, fitness and experience levels which raises £10+ million a year for charities!
You’ll get full support all the way so you can set a new goal in the great outdoors and push yourself over 25km for an important cause. If you’re up for a charity challenge this year, make it the Windsor 50 Ultra Challenge®.
The Ultra Challenge Experience
Do it at your own pace and enjoy your day out. The level of support enables you to go further. There are marquee rest stops, lots of food and drink, medical and massage teams, with a fully signed route to guide you.
A big finish-line celebration awaits with an amazing sense of achievement for you personally and also for your fundraising efforts.
Get Sponsored for Charity
You’ll be amazed how much you can raise on these tough challenges as friends and family will recognise and support your courageous endeavours as you cover more than half a marathon! All fundraising goes directly to your charity via an online JustGiving page.
£10+ Million Fundraising
The series raises £10+ million a year for charities. Choose your charity, set up a JustGiving sponsorship page and make your challenge count!
Prefer to enter directly? General entry options are explained on the 25km page.
Event photos
Event video
Charity places
The charities below have places in the event. To secure your charity place, simply find a charity then book a charity place or join a charity team with your own place.
- Average fitness
- Beginner-friendly
- Event village
- Families
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 at your pace, as an Individual or a Team, for a charity of your choice or just for you.
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 Windsor 50 Ultra Challenge® is fun, safe, and rewarding with full support all the way, enabling you to push yourself further in wonderful historic scenery, and enjoy a great day out!
- Check points
- Circular route
- Distance markers
- First aid
- Food stations
- Marshals
- Navigation not required
- Sweeper
- Toilets
- Undulating
- Water stations
- Way markers
Overview
The 25km loop heads along the Thames Path passing Alexandra and Home Park, with a pit stop for snacks and drinks near historic Runnymede, before heading to Windsor Great Park with magnificent views of the Castle. Then back to basecamp for the finish line celebrations.
Map
Checkpoints
- 15km – snacks, hot drinks and water
- 25km – picnic lunch
- Finish – glass of fizz, medal and t-shirt
- BBQ
- Cafe
- Camping
- Changing facilities
- Music
- Paid parking
- Rural
- Secure bag storage
- Showers
- Toilets
- Fundraising materials
- Fundraising support
How to start fundraising
You need to create your fundraising page on JustGiving within 48 hours of registering for your challenge. Then you can start your fundraising by sharing your page online with your friends and family.
Fundraise as a team
As long as you’re all fundraising for the same charity, you can create a team fundraising page on JustGiving. You will still have to reach the combined total fundraising amount as the target is per person, not per team.
Fundraising concerns
Speak to your charity about any worries. They are the experts and will offer you support, materials and inspiration throughout.
Remember only 50% of the target has to be reached 3 weeks before the challenge meaning you’ve got time after the challenge to impress everyone with your achievement and keep on fundraising.
Help for you
If you don’t reach the fundraising target, there are alternative options. You can always change to a self-funded place and still take part in the challenge.
Next steps
Once you've got your charity place, your details will be passed to the charity and you will hear from them within 14 days.
We were so impressed how well organised it was. From registration to the finish line everything was amazing - the staff were so lovely and helpful - the catering was outstanding and all the facilities clean and tidy. A huge thank you to you all!!
For my first event I was amazed at how well organised it was. Particularly as I was on my own. Very well signposted. Excellent medical assistance. Very friendly crew. Fab event!
- Camping
- Chip timing
- Drinks
- Event app
- GPS tracking
- Map
- Medal
- Snacks
- Training plan
- T-shirt
Before
- Challenge app
- Facebook forum
- Training guides
- Fundraising support
- Training walks and runs
- Video briefings
- Travel planning
- Parking
During
- Baggage transfers
- The start line
- Timing and GPS tracking
- Rest stops
- Food and drink
- Medical support
- Camping
Along the route
- Fully signed route
- Apps, maps and GPS
- Route safety experts
- Emergency response
- Trek masters
- 24 hour control room
After
- Finish line experience
- Finish times and certificate
- Shuttles and transfers
- Hot meal
- Medical care and follow up
- Deals on future challenges
Bookable extras
- Breakfast
- Parking
- Pre challenge transfers
- Post challenge transfers
- Baggage services
