The road had some deep ruts with tall bushes growing on both sides. It looked like this road could be very challenging if it was wet. This wasn't an official park road anymore, just a dirt trail heading through the desert. We came up on some semi-abandoned looking house with a water tank in the middle of nowhere, kind of hoping that there was nobody there. There was no one.
Eventually we reached the highway and proceeded west back towards San Luis Rio Colorado. Long portions of the highway were under construction with detours through the dirt, where we had fun passing semi-trucks - Raptor got almost squeezed on one of the turns by a semi, so Jesse had to give it some gas and do a drifting double-slide thru the turn - good times!
Eventually the highway reached a point where it was running right along the border fence. The fence is about 20ft tall and impossible to climb without a ladder or a rope with a hook that you could hook onto the top of it. However, in places where it comes up on a mountain it simply ends, so one could just walk up the hill and down into another country.
A few hours, another friendly military check, and we were back to the border line waiting to cross-back into the US of A...