Just started my Specific training weeks after 20 weeks of base period. My target vertical is 9000′, specifically Rainier car to car. I chose this because I’ve done Shasta car to car before starting training.

The book mentions doing a big day in the mountains with vert equaling my target for 50% of the weekly volume, for me this is around 4 hours. There is no way I’m covering 9000′ in 4 hours. Later in the book, it gives an concrete example of training for Cassin ridge involving a day with 100% of target vertical gain and you “take as much time you need to complete that task”. Which should I be doing? Climbing as much as I can in 4 hours, or climbing 9000′ and ignoring how long it takes? And how much time should be spent on the big day in the mountain vs z3 hill climb?