I've plotted on Google Earth the stopovers through Mongolia and into the first camp in Russia.
The red line is the route we would take as the crow flies - which obviously we won't be doing.
The map below is from the website 'Dangerous Roads' and the pins show some of the World's most dangerous roads that we might take if that's what the organisers have in mind. At least one of them is 4x4 only and has a gradient of 35% so I don't think we will be doing that.
I thought if I looked carefully at Google Earth I could second guess the route but it's completely impossible. The various pictures postyed onto Google Earth make Mongolia look rather lush, green and rolling. But I gather the rally organisers are capable of finding dry, dusty and hilly parts as well!