I recommend structuring your weeks of your two plans as follows:
Masters 40+ MTB Cross Country Base Training Plan
Masters 40+ MTB Cross Country Build Peak and Race Training Plan
| Date | Plan | week | |
| 2/10/2014 | Base | 10 | |
| 2/17/2014 | Base | 11 | |
| 2/24/2014 | Base | 12 | |
| 3/3/2014 | B, P, R | 1 | |
| 3/10/2014 | B, P, R | 12 | March 15 XC TT/March 16 XC race |
| 3/17/2014 | B, P, R | 2 | |
| 3/24/2014 | B, P, R | 3 | March 30 XC race |
| 3/31/2014 | B, P, R | 4 | |
| 4/7/2014 | B, P, R | 5 | |
| 4/14/2014 | B, P, R | 6 | |
| 4/21/2014 | B, P, R | 7 | April 27 XC race |
| 4/28/2014 | B, P, R | 8 | |
| 5/5/2014 | B, P, R | 9 | |
| 5/12/2014 | B, P, R | 10 | |
| 5/19/2014 | B, P, R | 11 | May 25 XC race |
| 5/26/2014 | B, P, R | 9 | |
| 6/2/2014 | B, P, R | 10 | |
| 6/9/2014 | B, P, R | 12 | June 14 XC short track/June 15 XC race |
| 6/16/2014 | B, P, R | 11 | |
| 6/23/2014 | B, P, R | 12 | June 29 XC race (mandatory for series) |