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 attain ITRA and UTMB Mountain Points on completion…
Up Next is Chester Ultra 100 Mile
Chester Ultra 100
05/04/2025
8th Edition | 100 Miles | 32 Hours | 1509m Elevation | 400 Places
£199
Ultra Scotland 100
07/06/2025
6th Edition | 104 Miles | 38 Hours | 4611m Elevation | 200 Places
£199
Beacons Way Ultra 100
26/07/2025
6th Edition | 100 Miles | 40 Hours | 6143m Elevation | By Application **Limited Places **
£199
Yr Wyddfa Snowdon Ultra 100
06/09/2025
7th Edition | 102 Miles | 40 Hours | 5788m Elevation | By Application
EARLYBIRD PRICE £189
Part Of The 100 Mile Grand Slam
Yr Wyddfa Snowdon Ultra 100 is part of the GBUltras Grand Slam. Take on 4 of our 100 Mile Ultra Marathons for the Grand Slam Medal & to get in to the Hall of Fame!
