Still not 100%

We had some nice temps in the low 60s today so I drove to the park and ran for almost 36 minutes on the grass. I had planned on running for a little over 40 minutes but my knee got a little stiff about 35 minutes in. The pain/stiffness was just inferior to the patella as opposed to the lateral side of my left femur. I don't know if it is related to my IT band at all or something different. My knee still cracks a bit during the day but it is doing it less.