What do you consider to be a long distance road trip?

It always depends on Cost per Mile per person. Obviously a single person is more costly than a family. It's usually a "tossup" when 1 person is traveling but the more people ... the cheaper the trip costs vs flying. A big consideration is food and lodgings .. figure $100 to $200 a day for that .. then of course gas and tolls. Don't forget that if you fly you may need a rental car

Sorry .. I didn't answer original question. A long trip is one that requires at least 1 overnight stay ... so it would depend on the drivers endurance

So, would you think that it would be pushing the limit for a single driver to go 600 miles in one day?

No, but as I said earlier it depends on the drivers endurance. With interstate driving ... that's about 10 hours including stopping for food and fuel

I see, 600 miles with an average of 55 mph is a little more than 10 hours.

In my experience there is a huge spectrum that people fall on regarding their tolerance for long distance drives. A single day trip of 600 miles is pretty long but can feel shorter with company in the car, good weather and light traffic. Alternatively, if it's raining, any part of the trip passes through a busy major metropolis, any part of it is on undivided lower speed highways, any part of it is mountain roads, etc, it can feel much much longer. And any unexpected delays (accidents, road work, weather) might send the wrong person over their tolerance for doing that in a day. I make an annual trip alone that is 720 in a day in my Forester. It's comfortable enough but doing it alone is something I have to mentally be prepared for.

2001Forester - understood, yes, this would be a similar situation for me and while I've done 450 miles per day alone, 600 seems like I'm pushing the limit on this. Although, the Subaru Outback is a much more comfortable car than my old Honda Accord which is the car I did the 450 span with.

Mark, I also forgot that you mentioned 2000 miles in your original question. If you'll be driving again the day after the 600 mile trip, that's a major consideration too. I've found that something about that 720 mile trip makes it really hard to fall asleep when I get there and have even gone a full night without sleep because of it. So if you'll be driving sequential days, that's another aspect to consider. I've always taken consolation in the fact when taking these trips that if needed I could pull over and fold down the back seats and sleep.

2001Forester - thanks, actually, that was just a talking point to get the conversation started. I'm thinking that I could probably go 600 miles in my Subaru Outback Limited for 575 to 600 miles, it's a long day, but, I wouldn't do a turn around and do that again without a day's rest in between. I'm driving out to help a family member move and help them get a truck. I don't want to be driving the truck back, I figured it would be easier driving back in the Outback. The seats in the Subaru Outback Limited are leather and very comfortable and adjustable.

600 miles is a long drive for a single day but road warriors do a 1000 miles in a day not that I am advocating that. As far as costs you have to do the math and include wear and tear on the car as well as gas costs.

I am leaving tomorrow on a 5,000 mile trip in my new 2019 Subaru Outback. I'm a pro photographer and I am shooting many locations out west. Gone 2 1/2 weeks. My new 2019 3.6R Limited is all ready to go !! Right now I have 1,700 miles on it. In 2 weeks it will have almost 7,000 !!!