Hallasan - South Korea’s highest, a shield volcano on Jeju with the Baengnokdam crater lake

The line through Jeju Island, South Korea - waypoints, elevation and the day-by-day shape of the walk.
Year-round
Fast-changing, wind, cold; snow in winter
Open year-round; a RESERVATION is required for the summit routes, with strict turnaround cutoff times; snow/ice in winter. Confirm.
Forest and boardwalk to a crater-lake summit
Non-technical walking/hiking; confirm any exposed or scrambly sections locally
Marked/waymarked route; navigation generally straightforward - carry a map and confirm locally
Suitable for reasonably fit hikers; not wheelchair accessible - confirm specifics
A popular, well-known route - busier in peak season
Seongpanak up (gentler) and Gwaneumsa down (steeper/scenic)
Seongpanak, Jeju
Point-to-point may need transport between ends - confirm
Day route - none needed
Day-hike kit, water, sun/rain protection, sturdy footwear; coverage varies
Services in Jeju City / Seogwipo; limited or none on the trail
Not required; self-guided
A reservation is required for the summit trails (Seongpanak/Gwaneumsa), with enforced cutoff times. Confirm.
Permits and operators change - confirm before booking.
The strict cutoff times, weather, ice in winter, the long day
Retrace the route to exit; dial local emergency services; carry a means of calling for help where remote
This profile is desk research, compiled from public sources - not a first-hand trail report. Coordinates are approximate.