I can't really think of many that are just about 'girls running around naked' in a positive or appropriate way. Most cultures have a sense of modesty, and when nudity is involved in stories, it is usually within a specific framework like art, religious ceremonies, or moral tales. So it's rare to find a straightforward story just about this without a deeper meaning attached.
In some ancient Greek myths, there are stories that might involve nudity in a more symbolic or artistic sense. For example, the story of Diana and Actaeon. However, these are not about girls running around in a vulgar way. Diana was a huntress goddess. When Actaeon accidentally saw her bathing naked in the woods, she punished him. These stories were often used to convey moral lessons or explain natural phenomena in the context of their culture.
Yes, in some Native American legends, there could be elements that might seem like this. For instance, some coming - of - age rituals for young girls in certain tribes involved a form of purification or transformation. But it was always within the context of their spiritual and cultural beliefs. It was not just random 'running around naked' but a part of a sacred and meaningful process.