Depending on where you begin your journey, the trek to the top can be done in as little as three hours. Lower down, the popular Cheonbuldong Valley explodes into a riot of color come autumn.
But the two-hour trek to the top of Ulsan Bawi (876 meters) can be particularly rewarding, not just for the physical exercise, but also the sensational views of the eastern sea, Daecheongbong and the valleys below.
You can start from Sinheungsa, near the Kensington Star Hotel.