Last trip I did to the Upper Animas was Memorial Day, 1994 with Ted and Wade Colwell, Jeff Green, David Thoma, and Robert Handford. Ted and Wade's wives, Jackie and Shaune, respectively, were our "pack mules" (Ted's words, not mine, so save the comments!) that carried our camping gear on the train.
You put in at Silverton, around 9000' elevation, and go about a half mile or so, then head into the first "squeeze," looking at a beautiful snow-capped peak rising high in the distance. The squeeze progresses into a short mini-gorge with some frisky water. Soon after, things start opening up, the action lets up a little, and you get views like this....

Wade Colwell and David Thoma
A few miles later, you get to one of the three named rapids, Garfield Slide, and 2-3 miles after that comes No Name, the hardest. Seems like we scouted and ran both of these on that day. The next few miles down to the foot bridge at Needleton and its
primo camping are rowdy, fun, keep-you-on-your-toes water.
So we pulled over at Needleton, got into dry clothes, and set up camp. Then Jeff Green walks up and says, in his soft-spoken Ozark twang, "Boys, you need to come and see this." He leads us back over to the foot bridge, and points at the water, which has, in the course of an hour or less, risen about a foot and changed from green to brown. Hmmmm.....
We wake up to bright sunshine and more warm temps the next day. After breakfast and packing up, we're on our way, the water is still high, and we cautiously work our way through a meaty Broken-Down Bridge rapid. From there, it's non-stop boogie water and more amazing alpine scenery till you get to the power station. A mile or two later, you come to the railroad bridge, which means it's time to scout the Rockwood Box. Here's our first look from above:

We hike on down the RR tracks and look straight down at the first big drop of the Box called Mandatory Thrashing. From high above, there are NO rocks showing anywhere in the gorge, but there actually appears to be a decent line through Thrashing, left of center.
Back at the boats, we work our way into the staging eddy above Thrashing. I go first, doing my best to remember the drop that's now coming at me at high speed, but looked so much different sitting still from 100 feet straight overhead. I head over the top of a big wave and stop - this can't be good - as suddenly as if a rope was tied to the back of my boat. I get tractor-beamed back into the big pour-over and get slammed upside down. Calmly roll up and get my eyes clear enough to see the tractor beam is still on and go back in for another round. Yeehaw! I get half-endered upside down, feel the stern hit the right cliff wall, and realize I'm free of the hole. I start to set up to roll when my paddle hits the rock and is knocked out of my hands. Wish I'd been calm enough to try a hand roll, but pulled the rip cord and came out.
Boat and paddle are collected, and I stroke for some calmish-looking water over on the left wall. Couldn't keep a grip on the wall AND the boat - didn't know what was around the corner - so I released the boat and scrambled up the bluff, soon joined by Wade, who had his problems with the big drop, too. The other three made it okay and headed downstream. Wade and I climbed up and over the top of the bluffs. Here's what that looked like - pretty much tells the story!
We make it back upstream to the RR trestle, and started our hike down to the Tacoma train station a couple of miles away. After a mile or so of hiking, Wade and I find our boats on the side of the RR tracks - wow! Back at the station, we find out that the rest of our crew found our boats sitting side by side in a big eddy in the Box. So they hike them up a big scree slope to the tracks, Thoma gashes his ankle on rock in the process, and they head back down to the river and finish their run through the Box.
We successfully evade the Sheriff, who showed up looking for trespassers on the tracks (us). Back in town, Thoma gets his ankle stitched up at the ER, then we head to Francisco's for the celebratory, could-have-been-a-lot-worse margaritas and Mexican-food dinner. We learned later that the river more than doubled in volume and hit almost 4000 cfs in Durango the next day. So we must have been riding a big surge all day.
Like I said earlier, the Upper Animas is a special place - a complete experience - the whitewater, the camping, the scenery, the train, and the Box at the end (optional). I won't wait 15 years to go back again!