So what do we have here? Eurotrash bicycle dick’s who spend thousands to travel to and bicycle in one of the most godforsaken countries in the world. If the terrain/ rattlesnakes didn’t get them the cartels would.
Another poster alluded to the fact that they were probably robbed and killed. Knowing the culture, they were probably robbed, then raped, then killed, and their bodies and bikes dumped into the ravine.
A forensic autopsy in a first-world country is warranted.
I have traveled on that road by bus, and the only road in the US that seems similar to me is the east side of Tioga Pass going up from Nevada to Yosemite. It is a scary road and an accident should not surprise anyone.