Elementary my dear Watson, elementary.
What do we see? Redrocks, a river, a road, monoliths and mountains.
Lets start with the red rocks, given the fact its a Tom Till work, we know its Utah, more specifically the greater Moab area. Next is the river in the foreground, given its in the Moab area, its either the Colorado or the Green. The road, well that leads us to knowing its the mighty Colorado (which should still be named the Grand River imo). How about the rock monoliths in the mid-ground, easily identified as Fisher Towers. And the snow-capped (or is that salt??) mountains in the background? Could be either the La Sals, Henry's or Blue Mountains... given our previous finds we know its the La Sals more specifiacally Mt Peale. Which leads me to one general area where one could line all of these findings up:
View attachment Fisher_Peale.kmz (open in Google Earth)
Wish I could post a side by side screen shot as I did get pretty close.
One would suspect you might find some tripod marks in the dirt about here: 38°48'13.32"N 109°20'38.20"W