Castle Race Series are rolling out a huge Black Friday offer this year, with 35% off every single race across the UK, Ireland and France. Whether you’re into triathlon, duathlon, aqua bike, open water swimming or straight-up running, it’s a rare chance to lock in an event for less.
The discount covers the full 2026 calendar, so if you’re already planning next season, it’s a good time to commit—whether you’re chasing a PB, stepping up a distance, or signing up for your first-ever triathlon. You can race solo, enter with friends or rope in your workmates for a summer goal.
Offer link: www.castleraceseries.com/black-friday/
Alongside their multi-sport events, The Commando Series—the popular Royal Marines–inspired obstacle course race—is also available at 35% off. With 3k, 6k and 12k distances, it’s built around crawling, climbing, mud trenches and full-on challenges led by real Commando instructors.
If you’re after something gritty, team-fuelled and a bit different to your usual race calendar, this is a solid shout for 2026.
Commando Series link: www.commandoseries.co.uk/black-friday/
