red · Confirmation required
The historic highway no longer exists as one continuous motor road; abandoned central portions are being restored as a vehicle-free state trail, while landslide and viaduct projects can close surviving road sections.
A mapped end-to-end drive entirely on the Historic Columbia River Highway is invalid and can direct a motor vehicle onto non-motorized trail segments.
Planning response: Build the journey from the open motor-road sections, use Interstate 84 between them and confirm current ODOT and TripCheck closures before departure.
