There is some interesting topography to the southeast of this where the flood entered the Snake River valley, but I believe it is due to subsequent erosion of the deposited material.
"badlands" are typically "dissected terrain," that is an eroded plateau. The badlands of Badlands National Park in South Dakota are an eroded highland between two rivers. Here's a sample, again with a 1 mile reference line:
That is a clear flood event. I studied some of the terrain and features on the ground a few decades ago, but to really see them all you have to do is do a fly-over. Pretty clear that a lot of the terrain consists of erosional features.
Re 179: In the first picture, there are numerous quasi-linear water bodies to the west of the present channel with lengths on the order of 0.5 to 1 mile, according to the photo. Some suggest oxbow lakes. Some may be due to glacial sculpturing and some may be due to pre-existing water channels. How much uplift has occurred in this area in post-Pleistocene times?