Arizona US 95 begins in the United States at the
San Luis Port of Entry, which connects it with Mexico. It then follows the
Colorado River northward to
San Luis and on to
Yuma, where it goes through town and crosses
I-8. As it leaves Yuma, US 95 is an undivided two-lane highway that passes through the
U.S. Army's Yuma Proving Ground. It then travels northward between the proving ground to the west and the Kofa National Wildlife Refuge to the east until
Quartzsite. Here, it merges with
I-10 and runs
concurrent, heading westward for until the Colorado River, where it enters California, just shy of
Blythe. US 95 spends in Arizona.
California US 95 enters California at Blythe along its dual segment/concurrency with
I-10. It travels largely parallel to the west bank of the Colorado River until it joins
I-40 in
Needles. The route then travels north from
Goffs to the Nevada state line. The total distance in California is about .
Nevada US 95 in Nevada is a divided highway between
Cal-Nev-Ari (the
SR 163 junction to
Laughlin) and
Boulder City. It is the longest highway in Nevada, at nearly . It joins at the interchange as a multi-lane divided freeway past
SR 173 and as part of the
concurrent route of
I-11 and
US 93 in Boulder City. It crosses
I-15 at the
Spaghetti Bowl, where US 93 becomes concurrent with I-15. US 95 continues as a freeway until again becoming a divided highway at Corn Creek Road, where I-11 temporarily ends, northwest of the
Las Vegas Valley. Shortly after entering
Nye County, US 95 becomes an undivided two-lane highway past the
Mercury interchange, as it meanders northwestward through the state, roughly paralleling the California state line. Along this route, it runs through the
Amargosa Valley, serving
Beatty before heading north into
Goldfield and
Tonopah. The highway is concurrent with
US 6 for several miles north of Tonopah, before it then heads north towards
Hawthorne,
Schurz (where it meets
US 95 ALT, which heads northwest toward
Yerington,
Carson City—via US 50 west—
Reno—via Ramsey Weeks Cutoff, US 50 east, SR 439 north, and I-80 west—and
Fernley) and
Fallon. North of Fallon, it meets and runs concurrently with
I-80 for , from Exit 83 west of
Lovelock to Exit 176 at
Winnemucca. It then heads north to the border with
Oregon at
McDermitt, a distance of .
Oregon In Oregon, US 95 is an undivided two-lane highway in the sparsely populated high desert in the
southeastern corner of the state, running completely in rural
Malheur County. From the Nevada state line at
McDermitt, the highway heads north and gradually climbs to its crest at Blue Mountain Pass, at an
elevation of
above sea level. US 95 descends to Basque Station and
Burns Junction at , then eastward down to
Rome () and up to
Jordan Valley (). The highway heads north-northeastward to the
Idaho state line, entering southwest of
Marsing in
Owyhee County. The speed limit on US 95 in Oregon was until March 2016, when it was raised to to match the speed limits set by Nevada and Idaho. US 95 is designated the
I.O.N. Highway No. 456 (see
Oregon highways and routes); "I.O.N." stands for Idaho–Oregon–Nevada. This section of highway is a primary commercial route between
Boise and northern
California, connecting to
I-80 at
Winnemucca,
Nevada. US 95 crosses into the
Mountain Time Zone approximately north of
Nevada.
Idaho US 95 is an undivided two-lane highway during most of its length in Idaho, which is over . US 95 enters Idaho from Oregon in
Owyhee County, about southwest of
Boise. It passes through
Homedale and crosses the
Snake River before a junction with concurrent
US 20 and
US 26, which run together for . As it proceeds north, US 95 crosses
I-84 and
US 30 before going through the
Payette National Forest. Immediately after
Riggins, the highway re-enters the
Pacific Time Zone as it crosses the
Salmon River. US 95 follows the descending river, then climbs over
White Bird Hill to the
Camas Prairie, then descends the Lapwai Canyon to the
Clearwater River. In August 2015, milepost 420 was replaced with one reading 419.9 to prevent the sign from being stolen by
marijuana enthusiasts. US 95 becomes a four-lane divided highway after crossing the river east of
Lewiston; it runs concurrent with
US 12 for several miles. The highways split as US 12 continues west to Lewiston, and US 95 turns northwest and climbs a steep grade up to the rolling
Palouse. At a junction with
US 195, US 95 proceeds north to
Moscow as a recently completed divided highway. It becomes an undivided highway in Moscow and continues north to
Coeur d'Alene, crossing
I-90. US 95 goes north to
Sandpoint, where it joins with
US 2, after which the highways run concurrent until after
Bonners Ferry, where US 2 heads east to
Montana, and US 95 continues north to
Canada, meeting
BC 95 at the
Canadian border, at the
Eastport-Kingsgate Border Crossing. ==History==