MAC_32
Footballguy
Do what works best for you, but I recommend when you hit a fatigue point to take it real easy the next week. Don't feel bad about scaling back to the 20 mile neighborhood. Then jump right back into where you were before. Betting money says you'll readapt to the mileage immediately, only faster, and at the same effort as before. This is a good method to improve your chances of staying healthy.