Half the distance, but no less of a challenge. This 5 mile course is perfect for teams and individuals looking for a fun challenge.
2018 charity entries are now closed
Take on the original 10 mile obstacle course with over 20 epic obstacles. Are you tough enough to conquer the ultimate challenge?
2018 entries are now closed
If you've got a place already from the event organisers, click below to request a sponsorship pack to fundraise for Cancer Research UK.
Don't forget to select 'Tough Mudder Series' as your event.
Hemel Hempstead - View map
Race day information
Any questions? Click here to read our most frequently asked questions, which should provide you with all the information you need. Or, you can contact the Sports Team on 0300 123 5461.