We almost turned around. There were a few miles that we were on a dirt road on the way to Xilitla. I think it was due to road construction.*
The Sierra Gorda mountains are beautiful. They are also huge. I thought maybe my perception was off because I haven’t driven through mountains in awhile. However, I just read on wiki that “[t]he area is extremely rugged with high steep mountains and deep canyons.” This describes it exactly. Many of the straightaways don’t have guardrails and you are only about 4 feet from death.
However, even that wasn’t the scariest part of the trip.