North Downs 50 Ultra Challenge
Sat 1 Aug 2026 Guildford, Surrey, UK

North Downs 50 Ultra Challenge

A fabulous challenge setting out from Guildford base camp on a looped route taking in some of the best of the Surrey hills, the North Downs Way, and the surrounding countryside.

4 races

  • Sat 1 Aug
  • #1 of 4
Loseley Park, Guildford

50km

08:30

Age 16 & over

£139

  • 50 km trail running + 830 m ascent
  • Sat 1 Aug
  • #2 of 4
Loseley Park, Guildford

25km Loop

08:30

Age 14 & over

£89

  • 25 km trail running + 530 m ascent
  • Sat 1 Aug
  • #3 of 4
Loseley Park, Guildford

1st Half

08:00

Age 14 & over

£89

  • 24 km trail running + 600 m ascent
  • Sat 1 Aug
  • #4 of 4
Loseley Park, Guildford

Guildford 10K

10:00

Age 8 & over

£49

  • 10 km trail running + 233 m ascent

Event overview

The routes have real variety and some wonderful scenery and fabulous views out to the south – plus they're easily accessible from London!

You’ll get full support and hospitality and with 25km and 10km options also available, along with optional University-style accommodation at basecamp –  there’s a North Downs Ultra Challenge for you!

The Ultra Challenge Experience

This endurance event is for a wide range of fitness and ages. Choose your distance and do it at your pace. The support enables you to go further, whilst enjoying the great outdoors and camaraderie.

There are marquee rest stops, plenty of food and drink, medical and massage teams, and a fully signed route with 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!

Event video

Event community

£0
0h 52m
Medina M.

Medina M.

Looking forward to running my first 10k

View team Sponsor
£0
Neil M.

Neil M.

View team Sponsor

  • 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, 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 North Downs 50 Ultra Challenge® is fun, safe, and rewarding, with full support all the way, enabling you to push yourself further in wonderful Surrey scenery, and enjoy a great day out!

Best support & hospitality

This Ultra Challenge® famously lays on the best support and hospitality available on any UK endurance-style event. This enables you to step up and confidently tackle an 'Ultra' distance, with the best chance of success - and to enjoy your challenge!

  • Bag transfer
  • Bar
  • BBQ
  • Cafe
  • Camping
  • Changing facilities
  • Entertainment
  • Free parking
  • Music
  • Park
  • Rural
  • Secure bag storage
  • Showers
  • Toilets

Event HQ

Loseley Park
Guildford
Surrey
GU3 1HS
UK

I cannot thank everyone enough for their personal support and unlimited energy. 5★★★★★ and 10/10 in all my experiences.

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!

Do it for charity

Looking to do this event for charity? Click below to see the full list of charities to secure a place or join a charity team with your own place.

Get charity place

Races at event

  • Sat 1 Aug
  • #1 of 4
Loseley Park, Guildford
50km

08:30

Age 16 & over

£139

  • 50 km trail running + 830 m ascent
  • Sat 1 Aug
  • #2 of 4
Loseley Park, Guildford
25km Loop

08:30

Age 14 & over

£89

  • 25 km trail running + 530 m ascent
  • Sat 1 Aug
  • #3 of 4
Loseley Park, Guildford
1st Half

08:00

Age 14 & over

£89

  • 24 km trail running + 600 m ascent
  • Sat 1 Aug
  • #4 of 4
Loseley Park, Guildford
Guildford 10K

10:00

Age 8 & over

£49

  • 10 km trail running + 233 m ascent
4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.