Like Gilman said above: when Dan Crain, and then Todd Andrew, passed on we lost a lot of Bighorns beta. Those boys had pioneered so much of the 'horns and had it wired.
We did a First-D on Shell Creek Canyon back in 2002 (I think). In fact the first waterfall pic in the Gallery here sure looks like the one at the little overlook above where we put-in:
I think Dan and Todd had run a lower section of Shell down to a little town earlier, but we hiked in up higher and did the First-D on the Canyon section. Cool desert area. Fun, manageable IV+/V- water. Todd said there is more stuff upstream. We scouted another roadside waterfall up there. Not a particulary pretty drop but probably runnable.
Tensleep Creek is cool. Again, Dan and Todd had probed out a lower section above the town of Tensleep (?) and then we all went in higher, above where the road crosses the creek. We did the first-D'd on another 2-3 miles of the upper stuff. I remember utterly continuous class IV+ and V water with smooth boulder gardens going on and on and on. As you go farther down into the limestone, the sharp, undercutty calcium-carbonate stuff becomes more prevalent. It's a beautiful little canyon ain't it? We found a good biker bar type joint in the little town (Tensleep?) where we realized that Todd had taped over our massive Big Timber footage with less-impressive Tensleep footy. The bartender chick was NOT impressed.
You may also want to check out Paintrock Creek. We did a long second-D on that one. Another non-stop 12 mile boulder garden - with heavy flow! We checked in at a ranch to get access and the ranchers were totally cool with it. I think the South Dakota boys (Dan and Tood) had first-D's on some of the Paintrock tribs too. It is beautiful up in there. We had a semi-epic day/night there...
Check out Goose Creek too. Todd talked about that a lot and had been working on some new sections of it right before he left us.
I think they ran a Boulder Creek too but I could be wrong on that.
Check out the March/April and May/June 2003 issues of American Whitewater. I put a 2-part article in those issues that described some of the Bighorn stuff.
Also check out http://www.riverbeta.com
That was a bighorn site that Dan told me about.
Dan also added info and pics to the www.Americanwhitewater.org
site with a bunch of Wyoming and South Dakota runs. That should be a big help to you.
Maybe I'll post some WYO pics sometime. There are some on http://www.ChasingRain.com
in the Nooz section. Scroll down a ways.
I'd love to get back to the Bighorns someday soon.
That's a lot of beta. Hope it helps.
Props to Dan Crain and Todd Andrew - the Bighorn Boys.
Team Eskimo USA