The system we use in the UK for trad (not bolted) routes has two parts. Exposure and technical difficulty. https://en.wikipedia.org/wiki/Grade_%28climbing%29#Br

The system we use in the UK for trad (not bolted) routes has two parts. Exposure and technical difficulty. https://en.wikipedia.org/wiki/Grade_%28climbing%29#British https://en.wikipedia.org/wiki/Grade_%28climbing%29#British I find this conversion chart useful. It's usually included in guidebooks. http://www.rockfax.com/publications/grades/ http://www.rockfax.com/publications/grades/ Basically a lot of these pitches would be E9 7b, which is insane. 7b is an 8b+ sport (indoor) technical grade. Very well done to the guys. Huge achievement.