I have been doing the daily RX with yoga.  The situation is specific to running an bending over.  When I run, it feels like someone is stabbing me in the left glute (high and to the outside).  After a while, I can feel pain on the inside of the thigh (more toward the quads).  Then my left glute gets exhausted; followed by dull pain in my knee.  Bending over, it feels like my left hamstring is forever tight.