Following the eastern slopes of the Cascade Mountains from Weed, California, through eastern Washington, Central British Columbia and on to become the Alaska Highway 97.
The highway stretches through very lightly populated landscapes of four states and one Canadian province.
From the point where it leaves Interstate 5 near Weed, California, Highway 97 follows the eastern slopes of the Cascade Mountains all the way into the interior of British Columbia, Canada and on to Alaska.
In Oregon, it enters the state near Klamath Falls and encounters hardly any towns until Central Oregon, where it crosses several highways in the region of Bend, Redmond, and Madras. At Biggs, Oregon, Highway 97 crosses Interstate 84 and then the Columbia River into Washington.Highway 97 in Oregon is part of the Journey Through Time Scenic Byway
The highway continues northeast in Washington, temporarily combining with US Interstate 82, then breaks from I-82 to the north at Ellensburg. (For further details, see Washington's Highway 97).
On someOregon maps, the route is known as The Dalles-California Highway.