One of the first things you notice if you look up in Missoula is a giant "M" on Mount Sentinel. The trail to the M is a popular hike, a steep zigzag that rewards the determined hiker with panoramic views of the valley. Mount Sentinel is also a favorite spot for hang gliding. You can obtain information and maps of recreation areas before leaving town at the Bureau of Land Management, 3255 Fort Missoula Rd. (tel. 406/329-3914).