According to pioneers, the Shoshone Indians built a V-shaped trap between a couple ridges and would herd pronghorn into it. About fifty Indians were needed to make this work, and they would smoke themselves with sagebrush to hide their scent.
We decided to hike over to the trap, as my husband knew where it was. I looked it up on Google Earth later so I could see it better. I outlined the trap with the red line below--look just inside it and you might be able to see the rock wall.
The boulders were still in place, but the willow branches my husband remembered seeing in his youth were no longer there.
The bottom didn't look much like a V to me, more like a U. I'm guessing the boulders used to be higher, or at least the branches, because they aren't very high walls now.
It was pretty cool seeing this remnant of a different culture out on the landscape.