Over the last 8 weeks I have built up to about 100 mpw(starting at 60, then 70, 70, 80, 90, 95, 96, 95). This week will be 100 and I will not be getting any higher. I am now 16 weeks away from my goal race and I am wondering how long I should keep running 100 mile weeks. Should I run 100's all the way up until about 6 weeks from the goal race and then get a good taper in, or should I start to cut back earlier. My XC season starts in about 4 weeks and I don't know whether I should drop to about 80 or so for the duration of the season. Any ideas?