Monadnock is a prominent mountain located in southwestern New Hampshire, known for its distinctive dome shape. Rising to an elevation of 3,165 feet, it is one of the most climbed mountains in the United States. The mountain is part of the Monadnock Region, which features a mix of forests, lakes, and small towns. The term "monadnock" refers to an isolated hill or mountain that rises abruptly from a surrounding plain. This geological feature is formed from erosion-resistant rock, making it stand out in the landscape. Monadnock is also a popular destination for hikers, offering various trails and scenic views from its summit.