Not completely naked but at least topless hiking story:
My wife and I recently went hiking on a very hot day mid week. We chose a lesser well known peak in a popular hiking area. As it was pretty hot an the middle of the week there were only a few other hikers on the common main track. The final path to the small peak seemed to be completely deserted.
The path was really steep and although my wife was just wearing shorts and a sports bra she got really hot and sweaty. I jokingly suggest that she should remove her bra to use the additional cooling surface of her big sweaty tits as noone was around anyway. To my surprise she actually pulled her bra down to her waist and continued the ascend topless.
Turned out it wasn't as deserted as we thought because we had two encounters with strangers. The first was a trail runner running down the mountain, my wifes naked tits distracted him a lot and the poor guy almost fell
When we took a rest at a bench besides the track we had our second encounter. My wife was sitting on the bench still topless, I applied sunscreen on her shoulders. Two young very attractive and athletic girls walked past us, greeting us and smiling. The summit was pretty close so my wife put her bra back on because she knew the two girls would be up there and she didn't want to be exposed again.
When we arrived at the summit cross we saw one of the girls posing next to it and the other one taking pictures. To our surprise the posing girl was topless
They were taking these classic instagram pics of a girl posing topless while hiking facing her back toward the camera.
We greeted them again, they were laughing and said to my wife that she inspired them. The girl taking the pictures then asked my wife if she could take a pic of them together. Meanwhile the already topless girl was now facing us. She had very small tits with tiny areola. She made no effort of hiding them. The other girl also took her top off, she had a bit bigger tits (B cup). They were both posing together, first facing their backs to the camera but then they turned around and my wife took some pics from the front. I was standing right next to my wife all the time and had a great view
They took a look at the photos still topless, then thanked my wife, but their bras back on and walked back down the mountain.
I really love that in Germany/Austria nudity and especially topless woman is no big deal