25km Loop
Sat 12 Jul 2025 Guildford, Surrey, UK

North Downs 50 Ultra Challenge | 25km Loop

The 25km looped challenge sets out from Guildford early Saturday morning, along some of the most picturesque parts of the Surrey Hills Way – with a rest stop at half way with snacks and drinks.

Charity places
  • Sat 12 Jul 2025
Surrey Sports Park, Guildford

25km Loop

07:00

Age 14 & over

£89

  • 25 km trail running + 530 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 challenge is part of the UK's number one series of trek and trails runs for a wide range of ages, fitness and experience levels.

Choose your challenge and do it at your pace. The level of support enables you to go further, whilst enjoying the great outdoors, camaraderie, and the challenge. 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 and once the aches subside you’ll feel energised, up for more of life’s real challenges – and, maybe, personal horizons redefined.

This event is part of North Downs 50 Ultra Challenge.

  • All fitness levels
  • Event village
  • Families
  • Newcomers

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 an Ultra March® option for ‘fast walkers’ – and a new ‘Solo Challenger’ start time to join up with others.

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! Here's a summary:

Before

  • Challenge app
  • Facebook forum
  • Training guides
  • Fundraising support
  • Training walks and runs
  • Video briefings
  • Travel planning
  • Parking

During

  • Baggage transfers
  • The start line
  • Chip timing and 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

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

Event HQ

Surrey Sports Park
Richard Meyjes Road
Guildford
Surrey
GU2 7AD
UK

Map

Click here to open map

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  • Check points
  • Distance markers
  • First aid
  • Food stations
  • Marshals
  • Sweeper
  • Toilets
  • Undulating
  • Water stations
  • Way markers

Overview

The 25km looped challenge sets out from Guildford early Saturday morning, along some of the most picturesque parts of the Surrey Hills Way – with a rest stop at half way with snacks and drinks. After 25km and over 500 metres of climb – it’s a celebration and lunch back at basecamp!

Map

map

  • Chip timing
  • Event app
  • Goody bag
  • GPS tracking
  • Map
  • Massage
  • Medal
  • Pre-event training sessions
  • Training plan
  • T-shirt

Included

  • 12km - snacks and drinks
  • 25km | finishers meal
  • Finish | glass of fizz, medal and t-shirt

Bookable extras

  • Accommodation packages
  • Parking
  • Pre challenge transfer
  • Post challenge transfer
  • Baggage transfers
  • Challengers meal

Charity places

This charity has places in the event. To secure your place, select a charity and provide your details.

All charity places
Health and Medical

Cure Parkinson's

Here for the cure; working with urgency to find new treatments to slow, stop and reverse Parkinson’s.

  • Fundraising support
  • Fundraising materials
  • Dedicated contact

Sign up
£22.50

Fundraise
£275

All charity places

  • Age 14 & over
  • Entries open
  • Charity entries open
  • Charity places
  • Enter online
  • Event merch available

16-17 year olds need to be accompanied by an adult.

Entry fees

Entry fee

£89.00

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!