My first tour was a total of 3500-4000 miles. I averaged, at most, sixty miles per day on that tour, with a lot of rest days and sightseeing. But I did several long days on that tour, and I found that I was quite capable of knocking off heavily loaded centuries, when I wanted to.
On my second tour, I decided that I would up the mileage ante, and I was able to average around 110 miles per day on mostly flat terrain for ten days.
On another tour, I pushed the average up to 135 miles per day over twelve days, and I knocked off 194 miles on the final day. On that tour I was really feeling mileage, and I often had to dig deep to find the motivation to keep pushing in the middle stages of the tour.
This summer I want to take another big leap in my daily touring mileage. I want to do a 2800 mile round trip. I want to sandwich two weeks of backpacking between two weeks of all out, ultradistance touring.
This seems like a pretty extreme jump in mileage, but I don't think it's unreasonable to think that I could do it. I've never really trained all that hard for a tour before. I think if I really push my weekly average mileage up to six or seven hundred miles for a couple of months before the tour, I can get my body to a point where it can handle that kind of punishment.
So I want to know if anyone has ever done a fully loaded tour with daily averages of 200 miles. If so, how did they prepare? And what kind of advice can they offer?