Increasing mileage/runs

I have continued to increase my run mileage in the hopes of being able to do more races (trail runs in particular), but also the 1/2 marathon in October.  Monday, I ran the same mileage as last Wednesday, in one minute less time.  Wednesday, I cut almost another two minutes (1:50) from that mileage and added another 1/2 mile.  Did my normal commute walking in addition to a couple extra morning walks with Bethany.  Yesterday (Saturday), did a "long" run of 4.5 miles in 51 minutes at Slayter Park - paved trail next to a river and lakes.  Today I hiked two slow miles with Lupe at the Attleboro Water Supply woods.

My knees have actually been feeling much better every day and the running doesn't seem to be affecting them.  I did feel them a bit after the hike today.  I also did some weeding in the gardens this afternoon, and tonight my lower back is killing me...doesn't feel good to bend over or turn.  Yikes!