first off Im wondering what your main goal is; the 45km run or the 4K-peaks in the alps?
If the latter, I`d recommend the 24-week Mountaineering plan since it includes for eg pretty long days back to back which is highly relevant for long days in the alps. It also includes progression wrt carrying weight during these runs. The strenght workouts emphasizes upper body also for a bit longer than the UA plans do which is relevant for climbing/scrambling.
This plan assimilates more the plans in TFTNA than UA. Im sure you will get super fit following the UA plan you suggested (I have both books and the 24wk plan), but the 24wk plan is even more specialized towards mountaineering I
d say depending on their technicality and how heavy of a backpack youll carry. For FL mountaineering the UA plans are perfect.
Please, anyone, correct me if Im wrong here.
Wrt vert, do you have any hills where you can condense down the distance while getting a good amount of vert? Im thinking laps. Remember the FKT-holder of the PCT and AT, Karel Sabbe, who is from Belgium which is flat as a pancake. He accumulated hundreds of vertical meters by doing so many laps on a local hill that even got named after him. Or John Kelly who lived previsouly in Boston who did some insane amounts of vert on a treadmill and a local 30m-hill – he is one of the few Barkaly finishers. I live in a “flat” place myself so I`ve lost count on how many laps I did on my local 100m-hill – but it works!