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

Possibly the filthiest thing you’ll ever do!

Welcome to the GRIM series, events for people who love to play dirty.

GRIM events are held on a variety of terrains from Army vehicle testing tracks to motocross circuits, so expect the unexpected! GRIM events are tough but fun – we know you wouldn’t want it any other way – with 6,500 GRIM nutters in 2012 being proof of that.

Enter as an individual or round up some mates and enter as a team of three people with many prizes up for grabs in all of our events!

We’re sure you’ve got what it takes – see you on the start line.

Let the filth begin!




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

Click here for team names


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