How long have you ever driven, non-stop?

I’ve driven between San Jose and San Diego in a day (about 450 miles and a little over 8 hours) a bunch of times, but I think my longest run was from Hart Mountain Antelope Refuge in eastern Oregon to San Jose. (510 miles/9 hours). It was the end of a road trip and we were going to take a leisurely 2 or 3 days to get back, but my traveling companion and I got into a huge argument and I decided I wanted to get home ASAP.