alaska Father and Son at Sunset

Nice composition (and title). I think a significantly reduced exposure and/or a split ND filter would bring out the colors that I know are in the sky.

I've tried two quick adjustments, and I think the light around the father-son has remained about the same while the exposure in the rest of the image has been reduced.

I'd try to

1) get closer to the people;

2) compose the picture so they are closer to the sun.