Thanks for the info guys!
I just got back from Tonghou.
Parked my car at the police outpost and started from there, approx 16 km to trailhead.
The Tonghou trail itself is a great trail. The further you go, the more technical it gets.
I went untill the point where there was a sign saying "Saddle - 2.8 km", so I'm assuming I was 2.8 km away from the top of the pass.
The ride down from there is great, it's a lot faster as going up
Anyway, next time when I have some more time on my hand (and in a better physical condition... party last night..

) I'm going to the top.
Does anyone know what's to see after the top? Is it worth going down at Jaoxi side off-road wise? I do have to return to Wulai for my car.