[2] They mainly follow Jeju's coastline and around its outlying islands, passing beaches, fishing villages, indigenous forest, tourist destinations, and urban centers.

[5] Jeju Olle Trail was modeled after the Camino de Santiago, a UNESCO World Heritage site.

[7] Jeju is a volcanic island that formed approximately 1.2 million years ago in four major eruption events.

[9] Among Jeju's numerous endangered plant and animal species, Hallasan National Park is their prime habitat.

Established in 1970, the park features Hallasan Mountain, South Korea's highest peak at 1,950 meters, at its center.

The Jeju Olle Trail, while traversing parts of the Gotjawal, has set up information centers and awareness programs to minimize the environmental impact of visitors to the area.

Frequently, orange buoys (known as tewak) can be seen dotting the sea as the haenyeo female divers harvest marine products.

They do so without any modern diving equipment, electing instead to use masks, small nets, and their endurance to catch just enough to be sustainable, ensuring that the marine ecosystem remains healthy.

It offers a trail with scenic views of the ocean and landscapes, including seaside walks, farm roads, and fields of rye, barley, and peanuts.

[20][unreliable source][21] Route 02: Gwangchigi - Onpyeong Olle (광치기-온평 올레) Total Distance: 15.6 km Total Time: 4 to 5 hours Difficulty: Medium Route 02 begins at Gwangchigi Beach, passes peaks and ponds, and ends at a small beach.

It continues to the Jeju Olle Tourist Center and passes landmarks like the Seogwipo KAL Hotel and Lee Joong-seop Cultural Street.

[30] Route 08: Wolpyeong - Daepyeong Olle (월평-대평 올레) Total Distance: 19.6 km Total Time: 5 to 6 hours Difficulty: Medium Route 08 includes the hexagonal basalt columns of Jusangjeolli, Yerae Ecological Park, and Daepyeong-ri Village, where the ocean meets the ridge of Andeok Valley.

[31] Route 09: Daepyeong - Hwasun Olle (대평-화순 올레) Total Distance: 11.8 km Total Time: 3 to 4 hours Difficulty: High Route 09 begins at Daepyeong-pogu Port, passes by the Moljil horse path, and continues to Gunsan Mountain and its scenic views.

[32] Route 10: Hwasun - Moseulpo Olle (화순-모슬포 올레) Total Distance: 15.6 km Total Time: 5 to 6 hours Difficulty: Medium Route 10 runs from Hwasun Golden Sand Beach to Hamo-ri and passes by several beaches and mountains, including Songaksan.

It passes through Yongsu-pogu Port, Yongsu Jeosuji reservoir and Nakcheon-ri Village, before continuing on through forests and past volcanic cones.

[38] Route 14: Jeoji - Hallim Olle (저지 - 한림 올레) Total Distance: 19.1 km Total Time: 6 to 7 hours Difficulty: Medium Route 14 goes from the green Gotjawal Forest to the ocean, passing scenic walls, the Artists' Village in Jeoji, farms, streams, cacti habitats, and sandy beaches.

The highlight is reaching Mundoji Oreum's volcanic peak, offering panoramic views of mountains and forests.

[40] Route 15: Hallim - Gonae Olle (한림 - 고내 올레) Total Distance: (A) 16.5 km (B) 13 km Total Time: (A) 5 to 6 hours (B) 4 to 5 hours Difficulty: (A) Medium (B) Easy Route 15 is divided into A and B courses, passing through fields, woods, and a dirt road.

The midpoint stamp is at Hangpaduri Hangmong Historical Site, which is known for its canola flowers in spring and cosmos in fall.

[43] Route 17: Gwangnyeong - Old Downtown of Jeju-si Olle (광령 - 제주원도심 올레) Total Distance: 18.1 km Total Time: 6 to 7 hours Difficulty: Medium A forest path along Musucheon stream to the center of Jeju City, Jeju International Airport, and the dragon-like Yongduam Rock and Yongyeon Bridge.

[11][44] Route 18: Old Downtown of Jeju-si - Jocheon Olle (제주원도심 - 조천 올레) Total Distance: 19.8 km Total Time: 6 to 7 hours Difficulty: Medium Route 18 runs from the center of old downtown Jeju City, past Sara-bong and Byeoldo-bong peaks, and passes by Jeju-hang (Port).

[49] Route 20: Gimnyeong - Hado Olle (김녕 - 하도 올레) Total Distance: 17.6 km Total Time: 5 to 6 hours Difficulty: Medium Jeju Olle's northeast coastal trail has views of the ocean, including Gimnyeong Beach, and potentially of haenyeo divers at work.

Its name is derived from "ganse-dari," meaning "slow idler" in the Jeju language, thereby capturing the spirit of leisurely walking on the trail.

These arrows serve as crucial markers to ensure that hikers can find their way along sometimes forested or confusing sections of the trail.

Detours are marked with two orange stripes to ensure that hikers can easily identify these alternative routes and stay on track.

Any passport holder is eligible for special discounts at accommodations, restaurants, cafes, transportation, and some entrance fees to Jeju landmarks, such as the island's only aquarium, the Jeju Folk Village Museum, the World Automobile Museum, and ferry and rental car discounts.

They will then be awarded a certificate and thru-hike medal, and if they agree, their name and photo will be published on the Olle Foundation website.

[55][57] A special certification program recognizes individuals who have completed both the Jeju Olle Trail and the Camino de Santiago, covering more than 100 kilometers on each route.

[59] The Jeju Olle Foundation and Tourism Board of Galicia signed an MOU on Friendship Paths[60] and from September 2022, participants can apply for the certificate of compliance for the mutual routes.

[67] An international network of Friendship Trails includes Spain, Canada, England, Switzerland, Turkey, Greece, Taiwan, Australia, and Japan.