I discovered some on the Rock Island, or whatever that Hawaii-inspired map is called. I love it! You can actually get stranded in the deep mud with a low-clearance vehicle. I want more places like that.
I haven't seen any deep mud on those maps. On the Jungle Rock Island is the first time I ever got stuck in mud in this game. I was surprised. I guess it came with the recent overhaul of that map.
I wasn't playing the game before that so i don't know, but i'm pretty sure there are big mud pits in the industrial site.
This is what I'm talking about. This is the first time I ever got completely stuck in BeamNG mud. It would be cool to have more places like that for mud bogging or what not. Clearance is everything.