Highway 12 Down to 1 Lane After Mudslides

Idaho Transportation Department reports road closure and partial reopening.

Mar. 15, 2026 at 3:04am

Got story updates? Submit your updates here. ›

Recent heavy rains and storms in the Boise area have led to mudslides that forced the closure of Highway 12 in Idaho. The Idaho Transportation Department has since reopened one lane of traffic on the highway, but the road remains partially blocked.

Why it matters

Highway 12 is a major thoroughfare connecting Boise to other parts of Idaho. The closure and partial reopening of the highway impacts commuters, commercial traffic, and emergency services in the region.

The details

The Idaho Transportation Department closed Highway 12 due to multiple mudslides that covered portions of the roadway. After assessing the damage and clearing debris, transportation officials were able to reopen one lane of traffic, but the highway remains down to a single lane in the affected area.

  • The highway was closed on March 14, 2026 due to the mudslides.
  • One lane of Highway 12 was reopened on March 15, 2026.

The players

Idaho Transportation Department

The state agency responsible for maintaining and managing Idaho's transportation infrastructure, including highways, roads, and bridges.

Got photos? Submit your photos here. ›

What’s next

The Idaho Transportation Department is continuing to monitor the situation and assess the damage on Highway 12. Crews will work to fully reopen the highway as soon as it is safe to do so.

The takeaway

This incident highlights the impact that severe weather can have on critical transportation infrastructure in the region, and the importance of the Idaho Transportation Department's efforts to quickly respond and restore access on major highways.