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Boise's Leading Local News: Weather, Traffic, Sports and more | Boise, Idaho | KTVB.com

Section of Idaho 21 known as 'Avalanche Alley' back open

The Idaho Transportation Department closed a 12-mile section of the highway Tuesday afternoon from Grandjean to Banner Summit due to avalanche danger.
Credit: Paul Boehlke/KTVB
This section of Idaho 21 is known as "avalanche alley." It takes a lot of work for ITD crews to keep it open during the winter.

The Idaho Transportation Department has reopened a 12-mile section of Idaho 21 that's been closed since Tuesday afternoon.

The highway between Grandjean and Banner Summit was shut down due danger of an avalanche.

We typically see a Tweet from ITD this time of year when we expect snow in the mountains.

This stretch of highway is known as Avalanche Alley.

ITD closed that stretch of road for two days last week. It reopened on Jan. 6.

The closure was between mileposts 23 and 35 – that is south of Stanley.

ITD posted on Twitter travelers should check ITD's website for updates.