Make your run count and help support people living with cancer. Macmillan will provide you with all that you need including a free running top, tops tips and plenty of treats on race day

Welcome to the GRIM Series 2015

Welcome to the GRIM Series; events for people who want a dirty adventure.

GRIM events are held on a variety of terrains from Army vehicle testing sites and training grounds to UK’s best motocross circuit, so expect the unexpected! GRIM events are designed tough but fun – we know you wouldn’t want it any other way.

We’re just finalising some of the dates for this year and launching a new, longer concept in 2015. Stay tuned!! 

The Beast is our new event – a super tough 10km over rolling countryside with a killer motocross circuit thrown in twice for good measure – you’ve got to see it to believe it. 

We know you want to come out and play, and we’re sure you’ve got what it takes. See you on a start line soon.


Let the filth fun begin!

You've given us some great team names over the years, here's our favourites

Click here for team names