I occasionally see black rat snakes at work but I've seen one for the last five years that is much bigger than the others. It's not a record rat snake by far but it tops the rest around there, best measurement I have is 5.5 of my 13" long boots and the snake was kinked along its full length, I guess it's about 6.5'. It's also not the prettiest snake, with a heavy body and several scars, it's easy to ID. I don't have a full length pic or anything for scale. I do have a crappy phone video but I'll spare you from that, it reminds me of the "Sasquatch walking in the woods" video but not as clear.
I've never picked it up even though I had the chance because it's never been in a place it wouldn't be safe when I saw it. I only move the ones in danger of getting run over or being killed with a shovel by our ophidiophobes.
Last time I saw it was last June near this rat snake about 3.5' long.
The big snake had smears of something liquid with dirt stuck in it near the tail. The pics are from that day. I'm thinking the small one was a male? Either way I call the big one Marge.
I have not seen Marge this year.