Well truth be told that's about half the trip. The other half looks kinda like this
Half that trip was desert flatland, the other half was either carving thru canyons or climbing mile-long grades (Dakota got a whopping 10mpg that whole trip). You can see not all of Oregon is green like the Cali-migrants think, in fact over half of it looks like either of the two pictures above. If you wanna be secluded, eastern Oregon is the place to go.