The first WEEK I had mine, I just had to see what it could do.
No major rocks, but I have a FWD only mind you.
I went up a steep dirt road near Estes Park, CO that quickly resembled less of a road, and more of a trail. I kept going and going... I was having a blast.
This was Colorado, in March, and I climbed higher and higher, and was soon at 9000 feet... above snow line... on a muddy, slushy trail.
It did fine until I hit a shady section, with glaze ice. I could go no further.
Had to make a 3 point turn, and go down the way I came.
It made me not feel so bad, when as I was turning around, an F250 4x4 came along and also got stuck. He put on chains to continue. I had none, so quietly retreated in EV mode.
Yes... I had mud up to the mirrors the first week, and that was the first and only time I tried something like that, but it sure was fun!!!

-John