A couple of years ago when I was on a guided elk hunt in Thorofare in the Teton Wilderness next to Yellowstone NP, saw some grizzlies there. 2 sows and 2 one year old cubs came within 50 yards of my guide and me. They were absolutely beautiful....for a bear! My guide was pretty nervous about them coming so close. luckily the wind was blowing from them to us and they had no idea we were anywhere near them. Sure wouldn't want one of them pissed off at me! they make our black bears look like pussycats.
I tried to get some pictures of them, but it was still a little dark and the one I took didn't really show much. My guide kinds freaked out when the flash went off, so I didn't try to take any more.