LAKE LANIER ISLANDS, Ga. (FOX 5 Atlanta) - Thousands of people are spending this weekend playing in the mud and tackling dozens of obstacles.
Lake Lanier Islands is hosting the Atlanta Terrain run.
Athletes ran 3 miles through the woods, climb over walls and through mud pits. They carried logs and sand bags, and swing from ropes – even taking a dip or two in the chilly water.
Participants say the fog they saw today added to the adventure.
And the rain helped wash off some of the mud.