Historic Columbia River Highway reopens at Larch Mountain Road after landslide repairs

TROUTDALE – The Historic Columbia River Highway will reopen by 5 p.m. Friday, Sept. 26, after repairs are completed to the section between Larch Mountain Road and Vista House.

We closed this section of the historic highway, also known as U.S. 30, on July 7 to vehicles, bicyclists and pedestrians to repair damage from the ancient landslide there.

We are grateful for the patience of residents, travelers and tourists during construction.

This section has required regular monitoring and maintenance ever since the highway was first built more than a century ago. In March 2025, geotechnical engineers noted that settling had accelerated and caused additional structural issues for guardrail and downslope.

These safety concerns prompted closure of this section of the highway on March 12. After temporary repairs and dry weather, we reopened this section of the highway March 25 while we designed a longer-term repair this summer.

Read the full press release from Oregon Department of Transportation here.