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Idaho 21 back open between Grandjean and Banner Summit

The stretch of highway known as "Avalanche Alley" had been closed since Monday afternoon.
A reader board on Idaho 21 announces the closure of an avalanche-prone section of the highway.

BOISE, Idaho — The Idaho Transportation Department has reopened a section of Idaho 21.

The highway between Grandjean and Banner Summit was shutdown Monday afternoon.

We typically see a Tweet from ITD this time of year when we expect mountain snow and that was the case Monday.

This stretch of highway is known as Avalanche Alley.

ITD closed the road for that very reason – they say there is a high avalanche risk along that stretch of road.

They closed to road between mileposts 23 and 35 – that is south of Stanley.

ITD posted on Twitter Wednesday morning that the highway is back open.

Travelers should check ITD's website for updates.


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