A mountain is a large natural rise of the Earth's surface that usually has a "summit" (the name for a mountain's top, which can also be called a peak). It is usually steeper and taller than a hill. Mountains are often thought of as being a hill which is larger than 600 metres (about 2,000 feet). However, some definitions say a mountain is a hill larger than 300 metres (about 1,000 feet).