My phone camera didn't capture the scene with the intensity of colors that I was seeing (of course!) but a little fiddling with the histogram and curves brought back much of the original depth and the incredible green of the hills.
It probably won't ever be "perfect" -- it's a little darker than I want it to be in the foreground, and there are a few distractions (the dirt road, the post) -- but it's moving in the right direction. Thanks so much, Helen. I have used the histogram before, but I never really knew what I was doing. (Had some fun making a layer mask to create a before/after effect, too!)