Yes, I tried running on both sections of Johnson Alley yesterday.  The section between Post Place and Montrose St. is completely overgrown with bushes, tree branches, weeds, ...  It took several minutes of very carefully maneuvering around the many obstacles in that alley to make it to the end, after which I was scraped up on my arms and legs and covered in burrs and other leftovers from the weeds and bushes.  

The section between Audrey St. and Alberta St was even worse.  I could not get through this section of Johnson Alley from either end.  

I took a couple of pictures if you would like me to send them to you.

Thanks for checking!

Doug Schneider