Message from Paul:-
"Hi, Hideous detour! now @ Naranbalag near Hyargas Nuur (lake) about to go east heading for Nomrog, then back on track. Hard going, V hot, Cars doing better than us! P&Z"
The original planned route was Mongol border, Tsagaanauur, Nogoonnur, Turgen, Ulaangom, Zuungovi, Baruunturuun, Bayantes, Asgat, Tudevtey, Nomrog.......
It looks like this has been abandoned for a route further south. Naranbulag is 70k SE of Ulaangom and is just west of a big lake (Hyargas Nuur) which has a road running along its north shore, heading directly for Tudevtey and Nomrog. I guess we'll have to wait to find out why the diversion, but other cars have mentioned swollen rivers.