Found it.
A legal road for some fun off-roading in Ellington.
Porter Road, a few miles off of route 83, is paved for about 3/4 of a mile... then the pavement just sorta stops.
Ahead is a fun and relatively challenging off-roading trail. You're basically driving on rocks, so you have to take it slow most of the time. Any time there were some REALLY big rocks that I didn't trust my truck with, the 4-wheeling public seems to have carved out some "workaround" trails, if you will.
I only went like half a mile in. The rest is for you to discover!