The Idaho Transportation Department announced Friday that all lanes of Idaho 21 between Grandjean and Banner Summit were closed to traffic. The 12-mile closure extends from milepo ...

The closures affect the stretch between Grandjean and Banner Summit and the segment from Granite Creek to Lowman between ...

The Idaho Transportation Department is closing State Highway 21 from Grandjean to Banner Summit and from Granite Creek to ...

2025 has barely begun, and there's already cause for concern ...

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Highway 21 will be closed beginning at 5:00 pm Friday, according to the Boise County Sheriff’s Office.The closure due to unsafe conditions will be from Granite ...

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Crews will close the highway from Grandjean to Banner Summit and Granite Creek to Lowman at 5 p.m., according to the Idaho ...

There have already been nine avalanches that have reached the road in Avalanche Alley and the Idaho Transportation Department has been forced to close Highway 21 several times this winter.