done laggan to Fort Augustus before, must be about 3/4 years ago. was about 90% rideable, maybe more.good rooad ride in to the bothy, and then just before you get to the zigzigs it started to get pretty erroded largely ridable though, depending on how soggy it gets, then you’re pushing up the zigzags. once up it was just fire road really, fairly rocky to begging with then it’s fine, and then there was some sandy bits that sent me over the bars about 3/4s the way down, 100% ridable on the down there(it imagine all ridable going down the zigzags to the bothy as well, potential for some unexpected otbs just after the zigzigs if it’s soggy).
All in all, it’s alright was touching the cloud at the top when I done it, view wise, not the greatest if the truth be told. just a case of following the track and the pylons. Glad I did it, but I’d be unlikely to be in a hurry to do it again, not saying I wouldn’t.