Who this is for
Use this guide if you want to walk part or all of a Jeju Olle course without treating every route as the same kind of day hike.
Choose the course before arranging transport
The Jeju Olle Foundation currently lists 27 courses and publishes distance, difficulty and estimated walking time for each. Compare those three fields first, then check where the course starts and ends. A route that looks short on a map may still be a poor fit if its finish point leaves you with an awkward evening bus connection.
Check current notices, not an old GPX or screenshot
The official site posts route, detour and stamp-location changes. Open the current course page and notices shortly before walking, especially after construction, bad weather or seasonal access changes.
Plan the return before you start
Save the Korean name of the finish point and identify at least one realistic public-transport or taxi fallback. On rural sections, do not assume frequent buses or easy street-hail taxis late in the day.
Carry what the route actually needs
Use comfortable non-slip walking shoes, water, weather protection and a charged phone. Carry a transit card plus some backup payment. Jeju weather can change quickly, and shade, shops and toilets are not evenly distributed on every section.
Finish with daylight to spare
Do not plan a rural or coastal section so tightly that a delay leaves you navigating an unfamiliar trail after dark. Start earlier than the minimum estimated walking time requires and keep enough margin for transport at the finish.
Before you walk
Reopen the official course page, confirm the current start/end point and any notice, check the day's Jeju weather, and verify your return connection. If the foundation has posted a closure or detour, follow that notice rather than an older third-party route.