When you’re off the paved roads, it’s generally advisable to ride slowly and with forethought, but not too slow. A faster speed and sufficient power on all wheels means a better ability to break through deep snow and overcome rough terrain. If the car has troubles overcoming an obstacle, make sure that the car’s clearance is high enough to cross over it. If so, try it again with a longer start and at a higher speed. A stronger entrance will often help.