There is no reliable date of when Pisgah Crater last erupted. Some believe that Pisgah Volcano is the youngest vent, of four cinder cones, in the Lavic Lake volcanic field. There may have been activity at this site as recently as 2,000 years ago; however others believe that the last eruption occurred as early as 20,000 to 50,000 years ago. It is too young for the potassium-argon dating technique, commonly used on specimens over 100,000 years old; as the volcano is basaltic, finding a reliable source of potassium for dating purposes would be difficult anyway. No charred organic material for radiocarbon dating has been found.