When I lived in Montana around 1990, I had a Mazda 4x4 pickup. That thing would go ANYWHERE!..me and my hunting pal went up into an area that usually was a dirt road that consisted of at least 8 inches of red colored dust. We were up on the hill grouse hunting and it started to rain. I mean rain, BIGTIME....now, you take bigtime rain and mix it with that dust, which I think had some clay in it, and you have greased snot. Lots of it...So, here we were, trying not to slide off the mountain side to get home. Some of the dropoffs were 6-800 feet to the bottom of the valleys. That little Mazda got us home in one piece. At times, the clay/snot would build up on the tires to 6 inches thick, but a little revving of the engine would toss it off. There were times my heart was beating real fast. Probably should have just spent the night on the mountaintop, but the wife would have been worried sick..
I regret not keeping that truck, as it would outclimb both the Fords I've had since.