Tundra hiking is unique in and of itself, difficulty will just depend on where you are. If I’m guiding guys from the 2nd Ranger battalion, I allow about 30 minutes to the mile to meet the float plane on time for our ride home. Rangers typically can do that w/o bitching too much, gives time to air out, secure gear and talk about the great fish.
middle aged relatively fit, 40-65; guys who own running shoes and have seen the inside of a gym I figure 45 to 50 minutes to the mile. Again not trying to prove anything with our pace, just a comfortable walk. Nothing worse then stuffing three guys, who could all afford to loose a little weight, into a 206 or 185.
If you’re old enough to have kids and grand kids and don’t walk your own dog I allow about an hour per mile. In 20 years I’ve only seen two guys who had trouble with a mile in the tundra.
my guess is you’re going to be able to find plenty of streams with reasonable hikes of a mile or so.
couple of Rangers last summer, fishing for char. Two from the sand box two from Granada and Panama. All served in Second Rangers. Love guiding these guys.