35 climbs steadily but not steeply to the junction with 26, without sharp curves. 26 to the SE feels a little more gentle, and may have more 3-4 lane stretches. The low point is near Warm Springs where it crosses the Descutes River. So it climbs back up to Madras, but I haven't driven that last bit in a while. Last time I took the route I took a narrower more curvy road along the river past an RV resort. 26 is the main route from Portland to the east side of the Cascades, so has a lot of truck and RV traffic.