Rat Race 100 miler - Castle to Castle Ultramarathon

100 MILE ULTRAMARATHONS FOR PEOPLE WHO DON'T DO 100 MILE ULTRAMARATHONS
Have you always wanted to tick off a 100 mile ultramarathon but you've found them too strict, too intimidating or just a little bit too serious. Then we have the perfect adventure series for you. The Rat Race 100 series is a collection of 100 milers you can complete at 2.5mph, fully waymarked, fully supported and fully designed for anybody to come and have a go at. There's no qualifying times required and no barrier to entry apart from your willingness to commit yourself to conquering this bucket list distance. We'll see you on a startline!​