Brad,
I recommend you start asap with this Base training plan Weight Loss and Base Training Plan. Start at week #1 and work through to April 22nd. If you start today that will get you to week #9 of the plan.
On April 23rd start the 100 Mile Mountain Bike Race – Personal Record Plan and follow weeks 1-12, ending week 12 racing at Crusher in the Tushar.
7/16 repeat week 11
7/23 repeat week 12 and race Butte 100
7/30 take a week off plan for recovery
8/6 repeat week 12 and race Breck Epic
Lynda