TransJeju by UTMB®
Fri, 2 October 2026
Corée du Sud, Corée du Sud
148 km
<p>When you say "Jeju" to someone who doesn’t know it, either they shrug, or they reply "it’s the Korean Corsica, right?" 🤷. So this is your moment to explain what this island really is 🫵.</p><p>A <a href="/en/tags/volcano" data-next-link="1">volcano</a> that rose out of the ocean two million years ago, <strong>listed three times by UNESCO</strong>, with a crater <a href="/en/tags/lakes-ponds" data-next-link="1">lake</a> at the top of its <a href="/en/tags/mountain" data-next-link="1">mountain</a>, some of the world’s most beautiful <strong>underground lava tubes</strong>, and biodiversity that runs from subtropical <a href="/en/tags/forest" data-next-link="1">forest</a> at the bottom all the way up to subarctic vegetation at the top 🌳. <strong>TransJeju by UTMB</strong> takes place in exactly that kind of place 🌋.</p><p>What makes <a href="https://en.wikipedia.org/wiki/Jeju_Province" rel="noopener noreferrer" target="_blank">Jeju</a> truly unique on this planet is that it’s the only p
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