SiEntries

19/06/2026

Have you been swept up by Spine Fever this week? Are you wondering if you could do it? Are you wondering if you want to do it? Then why not come and do 39 miles (ish) of the best part of the Pennine Way with NAV4 Adventure!

Staying at Alston YHA, you'll be bussed to the start in Bowless, you'll pass through iconic locations such as Low and High Force Waterfalls, Cauldron's Snout, Cow Green Reservoir and the geological wonder of High Cup Nick, before heading on to Greg's Hut and down the Yellow Brick Road to Garrigill and finishing in Alston.

Sign up here https://www.sientries.co.uk/event.php?event_id=16741

13/06/2026

Looking for a challenge in 2027?

Entries for The Woldsman 30 open today. Starting from Driffield Showground, you'll have 12 hours to complete 32 miles over the scenic Yorkshire Wolds. If this sounds like your sort of challenge, enter today!

32 miles from Driffield Showground over the scenic Yorkshire Wolds (to be completed in 12 hours).

08/06/2026

Entries are still open for the Focus Rides enduro at Macynlleth on 20th & 21st June. This is one not to be missed, with fresh loam, fresh stages built, get your entries in to test your skills.

Entries close soon so enter today!

https://www.sientries.co.uk/event/peaks-enduro-series-round-4-bnes-round-2026

Weldtite Merida Bicycles UK

Round 4 of a 5 race series featuring a five-stage mashup will take place in Machynlleth Wales. The event will include five timed stages that vary from flowing to technical, rugged and rooty to smooth and swift.

02/06/2026

Get ready for three totally unique, brain-twisting, heart-pumping adventures in the MindGames Summer Series! ☀️🏃🧭🎲

Each MindGames event combines movement, navigation, teamwork and tactical thinking in a completely different way, with a fresh set of rules every time.

Set in beautiful parks and open spaces across Surrey and London, these fun, family-friendly events are perfect for friends, families, colleagues and mixed-age teams.

Expect fresh air, laughs, strategy, a little chaos, and plenty of memorable moments. Join for one event or take on all three this summer!

If you're looking for something active, social and genuinely different, let the MindGames begin!

Sign up for the June events here:
https://www.sientries.co.uk/series.php?series_id=892
https://www.sientries.co.uk/series.php?series_id=832

A checkpoint based running and strategy game: Gold’s been found in town—but time’s running out! ⛏️✨ Round up horses, load trains, and build a drone network to earn and bank gold, all while dodging bandits. 🤠💰🚂🐎

01/06/2026

Entries are open for this years Cotswold Trail Events Ltd Broadway Marathon & Half

The Broadway Marathon & Half Marathon offers runners the opportunity to challenge themselves and each other amid the stunning scenery of the northern Cotswolds.

27/05/2026

The Five Rivers Ultra is now open for entries - are you ready?

A beautiful ultra-endurance challenge along the wild North Essex and South Suffolk coastline. 100 miles, 50 miles and 50km options for runners with generous cut-offs at all distances.

Entries open here:

A beautiful ultra-endurance challenge along the wild North Essex and South Suffolk coastline. 100 miles, 50 miles and 50km options for runners with generous cut-offs at all distances.

21/05/2026

Final entries for the Yorkshire Divide Seven Valleys Challenge close tomorrow, act now! 🚴‍♂️

Taking place on Sunday 24th May, Seven Valleys is a 100 mile / 162km circular route exploring the South Pennines landscape of heather moorland, steep valley slopes and former mill towns. Designed for gravel bikes & MTBs, the challenge is to complete the full route in one day.

Looking for a bigger bikepacking adventure?
Ride the Seven Valleys route over two days with luggage transfer of your gear to the campsite. Enjoy hot soup and bread rolls in the barn on Sunday evening, then pie ’n’ peas at the finish on Monday.

Enter here for the one day challenge: https://www.sientries.co.uk/event.php?event_id=16829

And here for the bike packing adventure: https://www.sientries.co.uk/event.php?event_id=16746

Seven Valleys is a 100 mile circular route that is 70% 'off-road' on tracks for gravel bikes & mtbs across the South Pennines landscape. Self-supported bikepacker or luggage transfer to the campsite. Pie n peas and cloth badge at the finish line.

15/05/2026

Enter the Hardwolds 40 today - entries close 24th May.

This stunning route follows the Hudson Way from Beverley to pick up the Wolds Way just outside of Goodmanham. The route continues to follow the Wolds Way passing through chalk landscapes, Market Towns & ancient villages

This may potentially be the last Hardwolds 40 due to lack of numbers - Sign Up Today!

The Hardwolds 40 route follows the Hudson Way from Beverley to pick up the Wolds Way just outside of Goodmanham. The route continues to follow the Wolds Way passing through chalk landscapes, Market Towns & ancient villages.

12/05/2026

The Lake District Running Festival closes in the next few days. Enter now!

The Grasmere Gallop Trail Races & OMM Lite Trail Quest join to create a packed weekend celebrating off-road running in the Lake District. The festival aims to bring together trail runners, fell runners & orienteers of all abilities in an iconic location.

Sign up here:

Parking and Camping options for the Grasmere Gallop Trail Races & OMM Lite Trail Quest

01/08/2025

Are you a developer looking for a new challenge?

Well, SiEntries is hiring...check out the job description

SiEntries is an Online Entries and Memberships System designed to simplify entering and administering any type of event which uses pre-entries.