100 Mile Ultra Marathons

Welcome to the GB Ultras 100 Mile Ultramarathon Race Series! Supported 100 Mile Ultramarathons taking you to fantastic trails in England, Scotland & Wales with incredible GB Ultras® Support at checkpoints and live online tracking from GB Race Tracker. Take on any of the races on their own, or take them all on for the Grand Slam!

All our 100 Mile events offer UTMB points

Days
Hours
Mins

Up Next is Ultra Scotland

Chester Ultra 100

2024 Coming Soon
7th Edition | 100 Miles | 32 Hours | 1509m Elevation | 500 Places

£169
Ultra Scotland 100

10/06/2023
4th Edition | 106 Miles | 38 Hours | 4611m Elevation | 400 Places

£169
Beacons Way Ultra 100

22/07/2023
6th Edition | 100 Miles | 40 Hours | 6143m Elevation | 250 Places

£169
Snowdon Ultra 100

02/09/2023
6th Edition | 100 Miles | 42 Hours | 5483m Elevation | 250 Places

£169

100 Mile Grand Slam

‘Simply’ take on all of the events above to secure your Grand Slam Trophy and entrance in to the GBUltras Hall of Fame.

Prefer A Longer Distance?
How About The RAS 215 Miles?