Mount Timpanogos is the second highest mountain in Utah's Wasatch Range (second to Mount Nebo). It lies in the Uinta National Forest. Timpanogos is an Ultra 58 with 5,269 feet of topographic prominence. The mountain towers over Utah Valley, including the cities of Lehi, Provo, Orem, Pleasant Grove, American Fork, Lindon and others. Heavy winter snowfall is characteristic of this portion of the Wasatch Range, and avalanche activity is common in winter and spring. Although it is a 14-mile round-trip hike with almost a mile of elevation gain to Timp's summit, it is one of the most-visited summits in the Rocky Mountains. There are two main trails of nearly the same length to the top. 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 10,380 feet. Other climbing routes exist on the mountain. "Timp Glacier" is a rock-covered mass found on a long, north-facing slope, and is snow-covered for much of the year.