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Interstate 84 (West)Interstate 84 runs from an intersection with Interstate 5 at Portland, Oregon to an intersection with Interstate 80 at Echo, Utah—roughly the same route as the Oregon Trail. Starting in Portland, the interstate runs through the Columbia River Gorge alongside the Columbia River Highway to The Dalles, then continues along the Columbia River to Boardman, at which point it veers off in a southeasterly direction, crosses the Blue Mountains, and continues toward Ontario at the Idaho border. Crossing the "heel" of the Idaho "boot", I-84 passes through Boise and Twin Falls, continuing on to the southeast and the border with Utah. Within Utah, I-84 connects Brigham City and Ogden, terminating at I-80 in the mountains near Echo, Utah. I-84 was known as I-80N until the late 1970s. The western I-76 (branching off in Nebraska and going into Denver) was I-80S. Federal law restricted the use of suffix letters on interstates, and these two were renumbered, as were some other highways that had E and W branches. The only remaining such split is I-35E and I-35W, which exists in the Dallas/Fort Worth area and the Minneapolis/St. Paul area. Length | b>Miles | km | state | | gcolor="#87CEEB" colspan="4"| | | 75 | 608 | Oregon | | 76 | 447 | Idaho | | 19 | 193 | Utah | | gcolor="#87CEEB" colspan="3"| | | 70 | 1247 | Total | Major cities along the route Intersections with other Interstates Spur routes See also Reference 84 84 84 84
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