Idaho Transportation Department
12/09/2025 | Press release | Distributed by Public on 12/09/2025 10:19
SH-21 between Sourdough and Banner Summit closed after rockslide
12/9/2025
Jill Youmans
ITD Communication
208.334.8303
[email protected]
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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Idaho Transportation Department published this content on December 09, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on December 09, 2025 at 16:20 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]