bomber crash site. The Mount Timpanogos peak is in the background. Mount Timpanogos is one of Utah's most popular
hiking/
climbing destinations and is climbed year-round. Winter climbing requires advanced mountaineering ability. In spring, undercutting of deeply drifted snow by streams creates a hazard that has proven fatal on several occasions. Climbers can fall through the undermined snow or more into the icy stream underneath. Although it is a round-trip hike, with almost of elevation gain, Timpangos's summit is one of the most frequently visited in the
Rocky Mountains. There are two main trails to the top: the first starts at Aspen Grove with a trailhead elevation of , and the second starts at the Timpooneke campground in
American Fork Canyon at . The two trails are nearly the same length. Hikers on the trails climb through montane
forest,
subalpine and
alpine zones. The hike is marked by waterfalls,
conifers, rocky slopes and ridges,
mountain goats, and a small lake,
Emerald Lake, at . A short diversion will lead hikers past the remains of a
North American B-25 Mitchell which crashed on the mountain in 1955 due to poor visibility during a flight from
Malmstrom Air Force Base in Montana, and
Hill Air Force Base in Utah. All five crew members died. Other climbing routes exist on the mountain, but they are more technically demanding and require special skills and
mountaineering gear. Prior to 1970, an annual Provo event called the "Timp Hike" sent thousands of people up the mountain's slopes. From 1911 to 1970 this one-day event (which took place generally on the third or fourth weekend in July) attracted thousands of people to the mountain. It also created the need for infrastructure, such as the stone shelter built in 1959 near Emerald Lake and a smaller metal shack on the summit (this was used as an
observation deck complete with brass rods etched with notches aligned with various landmarks). The hike caused environmental damage to the mountain, and was finally canceled to help preserve the delicate mountain ecosystem. Despite the presence of the existing structures, the mountain was designated a
wilderness area by the U.S. Congress in 1984. == Geology ==