When I was hiking in Oregon about 25 yrs ago, my dog ran off the trail a bit and had her head down with her tail wagging. I never found what SHE found, but nearby was quite a nice little two-person-sized shelter made from fir branches. I almost missed it.

From the smaller branches all over the top, I would guess that he/she had covered it with needle-covered branches (gone, fallen off). More of the same formed a thick mat on the ground.

And I found a funny, curved little knife, once. The cutting blade was on the inside of the curve.

Sue