Visit to a Portal

I don't know why it took me so long to recognize Tank Hollow as a great running route.  Maybe I was scared away by the bear hunters who gather at its entrance during September dog training and the real thing in December, or maybe it was this:

"What is it?" asks Virginia.

Maybe it's a portal, although I stepped inside and nothing happened, but then, as I walked away, I heard something and had the presence of mind to click.

Whoa!  Running, I shot another...

and again...

before everything went blank.