Trajectory of long runs

When I woke up this morning, my legs felt better than Friday or Saturday before the long run. Umm, how does a 15 miles run heal your legs? I'm not sure, but I do love long runs. Here's a visual of how I'll ramp up the mileage of weekend long runs:

Yes, there will be some tough weeks in June, but there's time in July to taper before the race!