12/9/2025
Jill Youmans
ITD Communication
208.334.8303
jill.youmans@itd.idaho.gov
SH-21 between Sourdough and Banner Summit closed after rockslide
STANLEY - A major rockslide happened overnight on State Highway 21 which has closed the highway between Sourdough and Banner Summit.
Crews are at the site of the slide assessing conditions and damage and preparing a plan for cleanup.
At this time the expected duration of the closure is not known. Drivers should use Idaho 511 as the best source information regarding closures and detour routes.
Additional information will be released once it is available.
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