U.S. Route 97 (US 97) is a major north–south route of the United States Numbered Highway System in the Pacific Northwest region. It runs for approximately through the states of California, Oregon, and Washington, primarily serving interior areas on the east side of the Cascade Mountains. The highway terminates to the south at a junction with Interstate 5 (I-5) in Weed, California, and to the north at the Canadian border near Osoyoos, British Columbia, where it becomes British Columbia Highway 97. Major cities on the US 97 corridor include Klamath Falls, Bend, and Redmond in Oregon; and Yakima, Ellensburg, and Wenatchee in Washington. A portion of the highway in California and Oregon is part of the Volcanic Legacy Scenic Byway. The highway was designated in 1926 as part of the original United States Numbered Highway System, replacing a set of routes designated by the state governments of Oregon and Washington. US 97 was extended into California in the 1930s and realigned several times in the 20th and 21st centuries. Route description California US 97 begins at an interchange with I-5 in Weed, California, near Mount Shasta at the northern edge of the state. The highway travels northeast around Weed and into Shasta–Trinity National Forest, passing several lava fields as it ascends the northwest side of Mount Shasta. It turns east at Haystack Butte and travels around Deer Mountain, crossing the shore of Grass Lake and serving a rest area. After another series of turns, US 97 reaches its highest point in California at Mount Hebron Summit, above mean sea level. The highway descends from Mount Hebron and leaves the national forest to travel northeast across the Butte Valley, a rural area with few settlements. After passing through the town of Macdoel, US 97 bisects a portion of the Butte Valley National Grassland and passes through a border inspection station operated by the California Department of Food and Agriculture near Dorris. The highway passes through Dorris on a series of city streets and continues northeast to cross into Oregon near a junction with California State Route 161 northwest of Indian Tom Lake. The California portion of US 97 is approximately long and lies entirely within Siskiyou County. It is also part of the Volcanic Legacy Scenic Byway system, which continues south from Weed towards Lassen Peak. Oregon US 97 travels northeast along the Klamath River from the California state line to