The pair, who haven't been named but are believed to be in their 20s, were found by the Edale Mountain Rescue Team after passing on the picture message.
The emergency services were also able to pinpoint their location via WhatsApp.
The couple got stuck after scrambling up a steep bank near Winnats Pass, a cave-filled valley in the heart of the Peak District.
In what the Edale Mountain Rescue Team called "possibly our first callout via selfie," the couple sent over a photo they'd taken earlier to help pinpoint their location.
The team could then work out where the pair were, get to them, and help them back down to safer ground with the help of a rope system.
Winnats Pass is in the heart of the Peak District.
"Quite a lot of people get into trouble because they rely on technology," duty leader Steve Rowe told the BBC, "but this couple were able to use their mobile phone and photos for their benefit so it was a good result."