The image is of high contrast, and so was the day, since while we were enjoying nature, not far from there, there was a fire.
The smoke from that fire is precisely what you see above the mountains in the background.
A second attempt at this image. My original idea was to darken the surroundings so that they form a frame around the sand and the people. This time I have taken it a little farther. I also warmed the colour of the sand. Done in GIMP. I see now that others have had the same idea!
I have done a quick edit in DT. However, the cameras exposure was skewed to the left leaving the shadows underexposed and without detail so I felt limited in what I could do with the shadows. I recommend for best editing start with a well exposed shot and avoid clipping of the shadows or the highlights. I use auto exposure bracketing to improve my success rate.