The thing I love about Pen (and I am localish) is the amount of grip the rocks and trail surface offer compared with other local trails. I am not saying you cant lose it, but if you have ridden other trails locally, and you see a big slab of wet rock you usually think, this could be slippy, but riding Penmachno for as many years as I have the rocks and trail surface have so much natural grip its fantastic.
I am no geologist, but I am assumeing that a billion years ago give or take a week, the same mountains were formed from the same spewing volcano spitting out the same lava that created the hills around the Marin trail, so why does the rock at Penmachno stick like S**t to a blanket.
In all the years all my near misses and crashes at Pen have been coutesy of the trail offering so much grip and confidence that you go so fast down a 12″ wode ribbon of singletrack and eventually run out of room / talent 🙂
Brilliant place, tough on kit though, trail surface unleashes a grey grit paste that likes to eat pads / seals / transmission. But dont let this put you off, its an amazing trail