Hi fishlicker,
Sorry for the delay. Here is a reply from coach Pedro Carvalho:
If the goal is to achieve the 9000 meters, you should do it no matter how much time it takes , but there should be a progression to achieve that goal…. For example : aim for 1500, then 2500, then 3500, then 5000, etc .
And how much time should be spent on the big day in the~ mountain vs z3 hill climb?
Your weekly volume should be bigger than the bigger day, and in most events the bigger day goes until 50% of the event day, especially if we are talking about a 100k race, 100 miles , or 10/12 hour hike. Zone 3 has specific times and rest periods for training
I hope this helps.
Jane