Those photos were taken at the Trona Pinnacles. You can get around the area in almost any vehicle, although that weekend it had rained recently and there were some low lying places outside the main loop where you could get stuck if you weren't paying attention.
Earlier in the day we took the nearby Mesquite Canyon Trail and explored all the side routes on our way to Burro Schmidt Tunnel. I definitely recommend that area, it was a blast but nothing too crazy for the brand new ride. Here's a pit stop after cresting a steep one (thanks ATRAC):