Have these been on here before? I don't recall seeing them. It's a Mexican SURVIVOR knockoff with similar challenges, though they seem to go on longer. Good mud scenes in both of these (starting around 28:00 and 23:30, respectively), especially in the second one, although the hottest girl stays clean.
The full video is here but it's blocked in the US. Just in case somebody reading this happens to be in (I guess) Mexico, or has a way around that. HINT, HINT.