Jeju Island has an oval shape, and measures 73km / 45 mi west to east and 31 km / 19 mi north to south. Hallasan Mountain is a dormant volcano which sits in the centre of the island and is the tallest mountain on the island with a height of 1947m (6,398 ft). To circumnavigate the coastline is a road trip of 258km / 160 mi. To drive from north to south from Jeju City to Seogwipo is a road trip of 40km / 25 mi and will take approximately 40 minutes.