I dunno. Booming thermals, high cloudbase -- you could probably do 1000km in a PW5 in Namibia if you just took one there.

Arizona is not Namibia, but we do have some spectacular thermal soaring, often with high cloud base. One of our members, Mike Parker, flew a World Record distance in a PW5 of 626 km here about ten years ago. Not sure about 1000 km, but 850 km looks doable.

Mike