Living in Los Angeles, California, staying physically active is part of the culture. Even though my wife and I are in our early 60s, we regularly go walking, hiking, and biking, and consider ourselves reasonably fit. So when I planned a trip to Patagonia in Argentina and Chile earlier this year, I wasn’t too concerned about the physical demands. Our plan was to spend a few days in Buenos Aires and then head south to the town of El Calafate—the gateway to Patagonia.

