It is possible to exploit a glitch to end up out of the map, which allows you to drive through water, among other things.
An easy place to do this is at the road near Vermilion Lake, as shown in the video included below. There are some trees near the edge of the water, where you’ll begin to get out of bounds warnings. If you release the gas and let yourself coast toward the far side of the tree on the left, you’ll get shot out of bounds. At this point, you’ll have the freedom to explore outside of the map.