My fortieth birthday

I am going to take a trip sometime next year to celebrate my 40th birthday. I'm thinking about taking about a month and doing one of the following:
i) back country snowboarding in Aspen or Jackson Hole or Calgray
ii) A himilayan trek with my friend Parthiv
iii) Motorcycle Europe
iv) Learn to fly and fly around America (yes, mom, that means a pilot's licence)
v) Rafting in New Zealand
vI) A month of intensive yoga
vii) Mountain climbing or eco challenge of some kind
Other places of travel interest are cuba, spain, and chile.

I thought about going to a buddhist retreat and sitting silent for a month but I don't think that works for me now. I need to get cracking on planning once I figure out what to do....any thoughts from you?