In pictures: Annual Mud Day

The mud pit contains 200 tons(181 metric tons) of top soil and 20,000 gallons(75,708 liters) of water.
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(JEFF KOWALSKY/AFP/Getty Images)
Kalie Weening of Ypsilanti, Michigan plays in the pit at Wayne County's annual Mud Day at Nankin Mills Park on July 11, 2017 in Westland, Michigan. The mud pit contains 200 tons(181 metric tons) of top soil and 20,000 gallons(75,708 liters) of water.
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(JEFF KOWALSKY/AFP/Getty Images)
Brian Wilson, 10 of Redford smiles after being crowned Mud Day King at Wayne County's annual Mud Day at Nankin Mills Park on July 11, 2017 in Westland, Michigan. The mud pit contains 200 tons(181 metric tons) of top soil and 20,000 gallons(75,708 liters) of water.
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(JEFF KOWALSKY/AFP/Getty Images)
People are hosed down by the Western Wayne Hazmat Team after playing in the pit at Wayne County's annual Mud Day at Nankin Mills Park on July 11, 2017 in Westland, Michigan. The mud pit contains 200 tons(181 metric tons) of top soil and 20,000 gallons(75,708 liters) of water.
MUD-DAY-04.jpg
(JEFF KOWALSKY/AFP/Getty Images)
Children race in the pit at Wayne County's annual Mud Day at Nankin Mills Park on July 11, 2017 in Westland, Michigan. The mud pit contains 200 tons(181 metric tons) of top soil and 20,000 gallons(75,708 liters) of water.
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(JEFF KOWALSKY/AFP/Getty Images)
A.J. Glander of Westland, Michigan waits for the Mud Day King judging during Wayne County's annual Mud Day at Nankin Mills Park on July 11, 2017 in Westland, Michigan. The mud pit contains 200 tons(181 metric tons) of top soil and 20,000 gallons(75,708 liters) of water.
MUD-DAY-06.jpg
(JEFF KOWALSKY/AFP/Getty Images)
Kids play in the pit at Wayne County's annual Mud Day at Nankin Mills Park on July 11, 2017 in Westland, Michigan. The mud pit contains 200 tons(181 metric tons) of top soil and 20,000 gallons(75,708 liters) of water.
MUD-DAY-07.jpg
(JEFF KOWALSKY/AFP/Getty Images)
Kids play in the pit at Wayne County's annual Mud Day at Nankin Mills Park on July 11, 2017 in Westland, Michigan. The mud pit contains 200 tons(181 metric tons) of top soil and 20,000 gallons(75,708 liters) of water.