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Flags from 22 countries were on display Tuesday as adventure racing teams paraded through the Old Yellowstone District in Casper.
More than 200 athletes joined the opening ceremonies for the Cowboy Tough Expedition Race, which this year also holds the distinction of being the Adventure Racing World Championship. The race begins Thursday.
The route will be kept secret until the morning of the race, but the course will include rafting, mountain biking and cross-country trekking. Teams will have up to six days to traverse about 450 miles, starting in Jackson Hole and finishing at Crossroads Park in Casper.
Elite teams may cover the distance in about half that time, though, with the first finishers expected to arrive late Sunday afternoon.
In existence since 2001, this is the first Adventure Racing World Championship to be held in the U.S. The Cowboy Tough race is now in its fifth year.