Mount Pico is at the eastern end of Pico Island. On the top of the mountain, there is round crater about in diameter and deep. Inside this crater () there is a small elevation produced by a recent, in geological terms, eruption that is known with the name of Pico Pequeno or Piquinho, which is about high. From the base of Pico Pequeno, volcanic smoke gets out with a strong odor of sulfur.