Update: YouTube videos of Hiking Concert Musicians

The beginning of this video is a little long while they unpack and set up at 3 am in the mountains. But their music in that space is noteworthy.

If you hear some unusual notes, it's because the cold thin air alters the violin strings.

These ladies fall within my description of Cave Artists, enjoying their art for the sheer pleasure and letting their art reach us outside of music venues and media devices.