Spring Trail Series

Spring Trail Series

Spring Trail Series


100KM, 50KM, 21KM


Haslemere, Surrey








15 APRIL 2023

spring trail series by ultra x

The Spring Trail Series by Ultra X takes place on the Serpent Trail, a stunning route that weaves through the greensand hills, river, woodland, and lowland heath of the South Downs National Park, a habitat which is rarer than rainforest and home to a variety of rare and endangered species.

The Spring Trail Series offers three race distances: 100km, 50km and half marathon.

As is always the case with Ultra X events, these are far more than just races, they are awesome experiences. At the start/finish there will be an expo selling merchandise, hot drinks, food and much more. You are actively encouraged to stay on after your race and enjoy the festivities, BBQ and bar.

The address for the start/finish is the same for all three race distances: Haslemere Recreation Association (GU27 3AR) or what3words location bleaching.dive.unwantedThe start is a 10 minute walk from Haslemere train station and there is also parking readily available in the town centre.

All races are held under full UK Athletics permit granted through the TRA.

2023 information pack will be released upon registrations opening for 2023 event.


Spring Trail Series by Ultra X 100km Elevation Chart


Spring Trail Series by Ultra X 50km Elevation Chart

Half Marathon

Spring Trail Series by Ultra X Half Marathon Elevation Chart


When you arrive at race check-in you will be issued with your race number, four safety pins and your timing chip. Race welcome and safety briefings will take place virtually. A video link will be shared with participants closer to the race date.


Registration: 05:00-05:30
Start time: 06:00
Cut-off: Midnight


Registration: 08:00-08:30
Start time: 09:00
Cut-off: Midnight

Half Marathon

Registration: 10:00-10:30
Start time: 11:00
No cut-offs


All finishers will receive a race medal. Different medals and ribbons will be awarded for each of the different race distances, as shown below. The longer the race, the bigger the medal!


90mm medal


80mm medal

Half Marathon

70mm medal


1. Race entry

2. Fully marked course

3. Medical staff on course and at start/finish

4. Osteopathy staff on course and at start/finish

5. Drinks and food at checkpoints and at start/finish

6. Ground assistance and full safety support

7. Digital copies of all images from event photographer

8. UTMB® World Series Qualifier race (100K, 50K and 20K)

9. Finisher’s medal

not included:

1. Travel to and from the event start/finish

2. Any accommodation

3. Personal food, kit and equipment (see kit lists above)

4. Comprehensive insurance (to cover cancellations, loss of items, injury etc)

5. Training costs

route and gpx files

Draft GPX files for each distance can be downloaded below. Please note that GPX files are subject to change at late notice due to permissions, access, weather, and other varying factors. Final GPX files will be provided to competitors before the race via email.

Experience The South Downs 

We understand that competitors may wish to travel to the South Downs with family or friends. Should they wish to enjoy the South Downs National Park while you race, we highly recommend visiting the following sights. Alternatively, you can visit them together after the event.

If one of your party would like to volunteer at the race while you take part, they can complete the Volunteer Application Form and we will do our best to accommodate them.

As part of the ‘Pounds for the Downs’ scheme, Ultra X are donating £1 per participant to the South Downs National Park Trust, which invests in projects that protect and enhance special places like the Serpent Trail. We are also encouraging participants to make a further voluntary donation, which can be added at checkout.

Arundel Castle

A restored and remodelled medieval castle established by Roger de Montgomery on Christmas Day in 1067.

Kingley Vale

This National Nature Reserve contains a grove of ancient trees which are among the oldest living things in Britain.

Seven Sisters Country Park

Now one of the most picturesque views in the world, the Sisters were created when ancient rivers cut valleys into the chalk.

What others say

“The Spring Trail Series 50km was such a great event. For many of us it was the first race back after a long hiatus and in true Ultra X style it did not disappoint. Fabulous course, incredible support from all the staff and volunteers but most importantly, it’s the Ultra X running community that makes it such a warm and accepting environment regardless of your background.”

Renee McGregor


“The Spring Trail Series 100km in April was the first time I’d entered a race organised by Ultra X and I can’t speak highly enough of the event, the route, and organisation behind it.  From the moment you enter, through to the regular detailed updates and the race itself you can tell how much thought and planning has gone into it, really impressive and means that as a runner all you need to think about on the day is putting one foot in front of the other and having fun! Whenever I spoke to a member of staff or volunteer they couldn’t do enough to help, did so with a smile which created such a welcoming atmosphere that perfectly captures what trail running should be about. Ultra X have set the benchmark for how a trail race should be run!”

Paul Dunstan


“The mini 21km trail run I did was the absolute highlight of the month, the Ultra X team did such a great job in helping us not only to prepare but to anticipate in every way in advance. The race was just perfect – great location, great transport connection, fantastic atmosphere which eventually attracted fantastic runners.”

Zita Galantai


“The Spring Trail Series had everything you could ever want from a trail run. From the views to the vibes, this Ultra X event, as usual, didn’t disappoint! Starting and finishing from the same point, the location was perfect, and the course sublime. Plenty of runnable trails, and a good helping of mud to keep it fun! 10/10 – would run again!”

James Cooke


Ultra X