Under a time limit, tribe members dive into a mud pit and cover their body with as much mud as they can. They then race back and scrape it off into a bucket. They cannot carry mud in their arms or in their hands, only their body. The buckets are then weighed, and the castaway with the heaviest bucket wins.
In Survivor: Borneo, the contestants returned to the mud pit of old Pagong camp to compete for cold beer and a trip to a bar to watch the first five minutes of the season. The castaways had five minutes. The winner was Kelly Wiglesworth.
In Survivor: Cook Islands, the castaways had to dive into a pool of mud and cross an obstacle in the way of return. The three castaways with the heaviest buckets after ten minutes would win a night at a spa. Ozzy Lusth, Parvati Shallow, and Yul Kwon won.
It appeared as the final five Reward Challenge in Survivor: Cagayan. After ten minutes, Tony Vlachos' bucket was literally overflowing with mud. Because of this, the other castaways elected not to have the buckets weighed and Tony was deemed the winner.
"Death of an Alliance"
"I Have the Advantage... for Once"
"Straw That Broke the Camel's Back"
- This challenge has only been used as the final Reward Challenge of the season.
- Every person that had the highest amount of mud made it to Final Tribal Council.
- Parvati Shallow was the only person to win the challenge and not make it to Final Tribal Council in the season the challenge was used. However, she made Final Tribal Council in two future seasons.
- Every winner of this challenge has returned for another season.