Mount Washington is a common objective, and is often climbed from Pinkham Notch. There are numerous trail approaches from the Appalachian Mountain Club's visitor's center. Although trail distances seem short, the trip to the summit should not be underestimated; most trail approaches involve at least 4,000 vertical feet (1,200 m) of climbing, including an ascent of the rocky summit cone and the boulder-strewn upper slopes. Weather changes very quickly, and one must be prepared for extreme conditions. The Tuckerman Ravine Trail is the most popular trail in the notch, ascending to the summit via the headwall of Tuckerman Ravine. The Huntington Ravine Trail is widely considered the most difficult trail in New Hampshire, making its way up the precipitous headwall of neighboring Huntington Ravine, where there are several rock climbing opportunities.