The interstate was closed south of Lodge Grass Thursday morning while more than 200 cattle "roamed" the roadway, according to a road report from the Montana Department of Transportation.
In an emailed road report issued shortly after 8 a.m. Thursday morning, MDT described the livestock as "100+ cow/calf pair" located about 2 miles south and east of the Lodge Grass interchange. At that point the Big Horn County Sheriff's Office and MDT were en route.
The incident was first reported at about 7:45 a.m. at mile marker 535.
By 8:48 a.m. MDT reported that the cattle were no longer on the interstate.
The Montana Highway Patrol's online incident tracker showed a report of a traffic hazard in the same location on I-90 east.
An MHP trooper ultimately did not respond to the incident. MDT did not immediately respond to a request for more information about how the cattle came to be on the roadway and how they were cleared.
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It's not unheard of for cattle to become an issue on Montana's roads. In September, 103 head of cattle were rounded up by a combination of law enforcement and local residents, some on horseback, on Interstate 94 east of Hysham.
A trailer that had been transporting the animals caught fire and they were released onto the road.