Most visitors picture white coral sand and turquoise water when they think of Udo Island. But on the island's opposite shore, down a canyon below Udobong, an entirely different landscape waits. Geomeolle Beach is only about 100 metres wide, yet its atmosphere is striking enough that it tends to stay with you long after you leave.
What the Name 'Geomeolle' Tells You
Geomeolle is a Jeju dialect word meaning 'black sand.' True to its name, the entire beach is covered in deep grey-toned grains formed by volcanic activity. The colour is closer to ash-grey than pure black, and under direct sunlight the particles give off a subtle metallic sheen you won't find on any other beach in Jeju. The official address is Yeonpyeong-ri, Udo-myeon, Jeju City, Jeju Special Self-Governing Province. Two of Udo's Eight Scenic Views are located near this beach: the 1st view, Jugan Myeongwol (moonlight over the sea by day), and the 6th view, Huan Seokbyeok (the rear cliff face).
Why August Is a Good Time to Come
During peak summer season, Udo's popular beaches fill quickly with visitors. Geomeolle, sitting inside a canyon below Udobong, requires a slightly more deliberate detour, which keeps crowds relatively thin by comparison. The August sun hitting the ash-grey sand produces a glittering effect that is particular to this season. The combination of surf sounds, dark gravel, and black rock walls in a single frame has quietly earned the beach a reputation among travellers looking for photographs that look different from the standard Jeju shot.
One Thing to Know Before You Go: Water Shoes Are Essential
The 'sand' at Geomeolle is actually fine gravel. Walking barefoot is genuinely difficult, so water shoes or sturdy sandals are not optional — they are necessary. Flip-flops, which work fine at most beach destinations, will not be comfortable here. Pack proper footwear before you make the trip down the steps.
How to Get There
Reach Udo Island by ferry from Seongsan Port or Jondalpo Port on Jeju's east coast. Once on the island, hire or rent one of the local transport options — electric car, bicycle, or scooter — and head toward Haumokdong Port, then follow the road that runs below Udobong. The beach sits below road level and is accessed by a staircase. For first-time visitors, searching '검멀레해변' (Geomeolle Beach) in a map app before descending will confirm the exact entry point.
Practical Tips
Udo draws its heaviest visitor numbers in August, so starting your day early gives you the most breathing room. There are few restaurants or convenience facilities near Geomeolle, so bring your own water and snacks. Alongside water shoes, a waterproof pouch for your phone and a spare change of clothes will make the visit more comfortable. Note that the dark gravel absorbs heat and can become very hot by midday in August — if your feet are sensitive, consider arriving in the morning or in the late afternoon when the sun begins to drop.
