Jeju Nature Guide: Hallasan, Forest Trails & Oreums

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Hallasan summit observation deck and boardwalk trail
The boardwalk trail near Hallasan's summit observatory · Photo © sunny

Jeju's nature isn't just beaches and cafés — it's a volcanic island shaped by a 1,947m mountain, hidden oreum, and forests unlike anywhere else in Korea. Whether you're planning a serious Hallasan summit attempt or just want a shaded forest walk away from the crowds, here's everything I've written on Jeju's mountains, trails, and oreums, organized in the order I'd read them myself.

☀️ Sunny's Tip Bookmark this page before your trip — I'll keep updating it as I publish new hiking and nature guides.
📖 Table of Contents

Here's the order I'd recommend for exploring Jeju's nature, from the big summit to the quiet forest trails.

1. Hallasan — South Korea's Highest Peak
2. Jeju's Iconic Peaks & Oreums
3. Forest Trails Worth the Walk

1. Hallasan — South Korea's Highest Peak

Hallasan is the mountain every Jeju itinerary eventually circles back to. At 1,947m, it's South Korea's highest peak, and it comes with reservations, trail choices, and a few honest warnings most travel sites skip. Here's the full picture, starting with the decision that matters most: which trail is right for you.

2. Jeju's Iconic Peaks & Oreums

Not every Jeju hike needs a full-day commitment. These volcanic peaks and oreum (Jeju's volcanic hills) are easier to reach, quicker to climb, and each has its own story — from UNESCO status to K-drama fame.

Stone step trail leading up a Jeju oreum through dense greenery
Stone steps on a typical oreum climbing trail · Photo © sunny

3. Forest Trails Worth the Walk

Beyond the peaks, Jeju's forests are where the island slows down. Ancient bija trees, a 10km trail through gotjawal and cedar, and a hidden oreum hike that stays cool even in summer — these are the walks I keep coming back to.

Boardwalk trail through a tall cedar forest in Jeju
A boardwalk winding through a cedar forest · Photo © sunny

That covers Jeju's nature side — from the summit to the forest floor.

Whichever trail you pick, plan around the weather, start early, and pack more water than you think you need. Happy hiking!