I think the last time was on a drive north from Fairbanks on the dirt road to Prudhoe bay, about 400 miles of dirt road with only 2 gas stations and no towns. I was in a rental car and the flat happened about 25 miles north of the Yukon River bridge, one of the gas stations. The rental car only had one of those small spares, not something I could drive back to Fairbanks on.
I put the small spare on and managed to limp to the Yukon Bridge, they said the tire could not be repaired. So I called National Rental Car and had a long frustrating talk with a rep in Chicago who had no concept where I was. Yukon Bridge is about 150 miles of dirt road from the next service station in Fairbanks. The rep said that National could not authorize a replacement tire that they would get me towed. A tow truck would have had to come out of Fairbanks, taken at least a day, and cost National a fortune. The guy in the shop listened to my end of the conversation and told me he had an old used tire he could put on for $25. The National rep said no, at that point I hung up and just told him to go ahead. I made it into Fairbanks on that old tire.
Rental car companies do not usually allow you to drive that road, but I managed to get a reservation agent, probably in Chicago to ok it and put it into the record before I picked the car up. In the end it didn't matter, but if I had done the tow truck it would have.