The Dalles Bridge carries U.S. Route 197 across the Columbia River between The Dalles, Oregon, and Dallesport, Washington. It is first of all an active highway crossing, not a staffed visitor attraction with a ticket booth or regular tour. Its value to a traveller lies in the way it joins two states, a river port, and a changing landscape shaped by transportation and hydroelectric development. The bridge stands just downstream from The Dalles Dam, but the two structures are not the same site: one carries road traffic, while the other manages navigation and power on the river.
Historical sources describe the bridge as a steel cantilever truss about 3,339 feet long, built from 33 sub-spans. The 2025 Oregon Department of Transportation (ODOT) bridge log identifies the Columbia River structure on Highway 4/US 197 and records a steel through-truss arrangement, with ODOT maintenance and Washington sharing costs. From a vehicle, the crossing is a brief part of a longer route rather than a place to stop and explore. For a safer, unhurried experience of the river, use public waterfront areas in The Dalles instead of treating a highway deck as a viewpoint.