Idaho and Oregon time zone line

Northern Idaho is Pacific Time: Benewah, Bonner, Boundary, Clearwater, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, plus the part of Idaho County north of the Salmon River. The rest of Idaho, including Boise, is Mountain Time. America/Boise is the IANA name; its 2026 clock matches Denver.

Oregon is Pacific Time except most of Malheur County, which 49 CFR 71.9(a) places in Mountain Time. A southern strip of Malheur, south of T. 35 S., R. 37 E., stays Pacific. The sample finds that strip, so Malheur is marked split rather than painted as a single zone.