The term 'Pennsylvania's ___ Mountains' can be filled in with two answers: 'Pocono' (6 letters) and 'Pocno' (5 letters). The Pocono Mountains are a range of mountains located in northeastern Pennsylvania. They are part of the Appalachian Mountains and are a popular destination for outdoor recreation, such as skiing, hiking, and camping. The highest peak in the range is Mount Pocono, which stands at 2, 133 feet. The area is also known for its many lakes and resorts.