I did Nant yr Arian last week and it was a very nice 4 hours. But it’s unlike any other centre because there’s a 15 mile ride in the country topped and tailed with the usual through the trees singletrack. It’s all very much wheels on the ground, but entertaining nevertheless.
Feels very wilderness. Oh, and there’s a real stinker of a final climb back over the ridge into the valley where the visitor centre is.
The trails are well marked and they are open 24 hrs a day. It’s just the caff & bogs that don’t open till 9.