[Journal entry for March 4-10, 2007]. Dallas and I are attending the Institute for Electrical and Electronic Engineers Aerospace Division Conference at the Big Sky Resort in Montana. The conference center in Huntley Lodge is right next to the ski area, so we are able to find several opportunities to hit the slopes. The weather is fine: sunny with temperatures in the high 20's and low 30's Fahrenheit. We usually start by taking the Explorer lift, even though it is rather slow, because it is just minute's walk from our hotel room. Riding it affords an extremely nice view of Lone Peak, the tallest of the mountains in the ski area, as well as a very picturesque wall of mountains across the valley to the east, that include the Spanish Peaks. The lift takes us over the lower slopes, and also over glades of tall, thin conifer treees. Once on the trails, we are able to ski over to the faster lifts that service the Andesite Mountain and the flanks of Lone Peak. We especially like the intermediate trails on Andesite Mountain, including Hangman and Ambush, for they are steep enough to be rather challenging. We ski each of them, and also Stump Farm on Lone Peak, several times. The "Bowl", a large cirque above the tree line on Lone Peak, is accessible by a second lift that can be reached via the Swift Current lift. The Bowl, with its steep rocky walls, is very impressive. I spend considerable time trying to puzzle out its geology, which is a trick, especially since most is covered by snow. There are clearly near-vertical strata on the north wall, and these are in places weathered into stone spines each twenty opr thirty feet tall. But the relationship of these strata to the rock on the south wall of the cirque is unclear to me. Perhaps there is some sort of fault between them? From the Bowl, a tram ascends to the summit, but I do not take it, since I judge that I do not have the skill to ascent the very steep, mogully slopes of the upper mountain. On the last run of each day, when the shadows are getting long, I try a little glade skiing. It's a little like cross-country skiing, and its fun being amongst the trees.