Wolves and grizzlies are very light on their feet; you can’t even hear them walking most of the time.
Another time in Yellowstone, my wife, daughter and I pulled out into a parking lot on a bluff overlooking a tall brown-grassed valley, and went for a hike. Down into the valley, up the other side and up a creek-shed.
Well up the creek, we saw some Griz tracks the size of dinner plates, so we didn’t stay long, and beat feet back toward the parking lot.
As we’re crossing the grassy valley, we noticed a whole bunch of people in the parking lot with binoculars apparently looking at us. Weird. They started waving, and we waved back. We could hear them in the distance shouting, but it was too far to hear anything.
When we got up to the parking lot, they asked, “Did you see them?”
“See what?”
“The pack of wolves! You walked right through them ...”
Nowadays in wolf country, I carry a 9mm 16+1, 16 mag, and 13 mag. Can’t be too careful!