
Jim Urquhart / Reuters
Kail Mantle rounds up horses during the Montana Horses Annual Horse Drive outside Three Forks, Montana, May 4, 2012.

Jim Urquhart / Reuters
Wrangler Shad Boardman rides his horse across a river during the Montana Horses Annual Horse Drive.
The Mantle family, who own Montana Horses and who have invited the public to witness horse drives for the last 11 years, are holding their last horse drive. Approximately 300 horses are rounded up and driven 35 miles from their winter range to the Mantle ranch over the course of three days. The horses are later picked up by leasers to be used as pack and trail horses at dude ranches and national parks.
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Jim Urquhart / Reuters
Horses run to the corrals during the Montana Horses Annual Horse Drive outside.