Granted I haven't been out since all the rain, but I'd vote flooded with water and mud. There are some wet crossings, even on a dry day - so places like the bog will just swallow you and your bike whole.
Of course, I could be wrong. Try it out and post what you found. If we don't hear from you in a few days, we'll assume the bog ate you.
Lay off your brakes, they're only slowing you down!