Rode this route a couple of weeks ago in great weather.
Fort Bill to KLL on the WHW was fun in places, carried the bike up a few staircases but mostly rideable.
KLL to Courror station via mennanach bothy. A steep climb out of KLL,(Yeah I would have saved loads of time by not descending into KLL and continuing on L/rover track, but I fancied a brew !!) L/rover track is very good past eilde mor/beag to luibeilt. I forded the river here, it was knee high so buckshee! The view was fantastic looking up towards the grey corries to the north. From Mennanach bothy to the southern end of loch trieg was a pain in the arse. A lot of carrying through very boggy ground, although it did get better near the end. Good track from there to the station.
Corrour to Culra bothy. Good l/rover track to the northern end of loch ossian, uisge labhair was rideable on a grassy track for about a K then loadsa carrying up the river, wasnt as bad ground as I had experienced earlier in the day and I made good time. The singletrack from Bealach Dubh to Culra is outstanding, in fact its awesome !!
I think it was around 75k and loadsa fun !!!!!!!
Thanks to 13floormonk who I bumped into on the train for all the advice, and to ev1 who commented on the thread.