The classic route to the summit of 14,259-foot Longs Peak in Rocky Mountain National Park is one of Colorado's most challenging and popular 14ers. This 13-mile round trip with nearly 5,000 feet of elevation gain traverses diverse terrain, from forest and alpine tundra to exposed rock faces requiring hand-and-foot climbing. After reaching the Keyhole formation, the route becomes increasingly difficult, crossing the intimidating Narrows and steep Homestretch before reaching the surprisingly flat summit. Early starts (2-3am) are essential to avoid afternoon thunderstorms, and the route is typically attempted only from late July through September when free of snow and ice.