We took her to a Sniffspot (like Airbnb for dog parks/spaces) near Temecula. It's a 20 acre avocado farm! She was able to run free and roam through a beautiful stream.
I had to pull on the thing really hard three or four times before it finally let go. After that she couldn't walk on that foot and she was freaking the fuck out.
It happened on the trail back to the car, too, so we had to get out of there before the next renters showed up with their dog(s), who could potentially have been as reactive as Brie.
idgiebay ended up carrying her as far as she could, but she's not a small dog and we had a bunch of stuff with us, so Brie kind of hobbled part of the way.
Bonus: we had no cell service out that far and no GPS so we couldn't figure out how to get back to a major city and find an ER vet. Thank goodness she ended up not needing one.