I am planning on doing the Indianapolis 500 Half Marathon in May. I am a real slow (around 12 minute pace) half marathoner so I'm looking at a 2:40 or so time. My max mileage week for the event will be 22 miles including a 14 mile long run. I am then planning on doing a 2 week taper to heal up from the training. My feet and knees get pretty knicked up when I do this kind of training and in the past a 2 week taper allowed me to enjoy the race pain free.

I usually do 2 4 mile runs each week plus a long run each weekend. What would you recommend for my weekend longish runs in the 2 weeks preceding the half marathon?