I`ll guess Skye, or just before Plockton.
No, from the three main clues,
1. Quite a big fresh water loch.
2. Near a road judging by the three visible telephone poles on the left.
3. Red-ish rock band on the hill although that could just be the light, would suggest Torridon or if it is just a trick of the light possibly the lime stone of assynt/far northwest. Either way the rock band looks sedimentary in nature.
So it's not round this part of the world as we don't have that type of loch/road set up here and the rock type looks wrong.
Further speculation on my part orientates the loch running SW to NE, the tent is parked on the SW end (less evidence of wave wash on that shore, and if it is scotland there'd be more evidence of wave action if it were to the north or north east end) I think the photo looks to have been taken in the morning which puts that road on the left of the photo to the north of the loch.
So I'll go for a road side location in Torridon or NW Sutherland.