Tired evening run

I spent a lot of time driving today- about 5 hours total. We left at 7 this morning, and since I ran yesterday afternoon, I waited until this evening to run. My legs were still tired for sure. I can always tell because my left knee feels weak when my legs are tired. But I toughed it out for the last 3 miles by focusing on my form, taking nice easy strides and not favoring my left leg. Good enough. A beautiful night for a run anyway. Clear as a bell, shining stars and 1/4 moon.