I've messed with processing this image in Lightroom on and off for a couple of months but I could never the get colors to feel right for me. This weekend, I re-started working with the VSCO presets for Lightroom and so decided to give it a try. I got rid of everything I'd done to the image before, going back to a flat raw file and found that with just one click the Velvia 50- preset gave me almost exactly what I was looking for. I didn't have to do much else other than crop and apply the "DR lows boost" tools preset. In the end, it ended up being about 20 seconds in total of processing.
Sossuvlei Dune - Sony A7r, Leica 90mm f/2 Summicron, ~f/5.6, 1/2000s, ISO 400