{"version":"1.0","type":"card","id":"611d5779-607d-453c-881f-59cfbf2a2d1b","url":"https://stacklist.com/card/611d5779-607d-453c-881f-59cfbf2a2d1b","title":"Koko Crater Railway Trail","source_url":"https://kokocratertrail.com/","note":"Difficulty: 🔴 Hard\nDistance: Approximately 1.6 miles round trip\nEstimated time: 1.5–3 hours\nTerrain: Very steep railway-tie staircase\nThis is more of a workout than a traditional hike. Hundreds of old railway ties climb almost directly up Koko Crater. It is steep, physically demanding and highly exposed to the sun, but the views from the top are spectacular.\nAvoid the hottest hours of the day, particularly if you are not accustomed to Hawaiʻi's heat.\nBring: Plenty of water, electrolytes, sunscreen, hat, snacks and athletic/hiking shoes with good grip.\n\n\n","image":{"url":"https://ucarecdn.com/733f2d72-feaa-44f2-af73-f6edca72b30f/","alt":"Koko Crater Railway Trail","width":1200,"height":800},"stack":{"id":"76467c4b-c4ea-4299-8764-34009edefadb","title":"Hikes on Oʻahu: Honolulu Hiking Trails from Easy to Challenging","url":"https://stacklist.com/stack/76467c4b-c4ea-4299-8764-34009edefadb"},"created_at":"2026-10-13T14:25:35.843Z","updated_at":null,"aco":{"summary":"Koko Crater Railway Trail is a challenging 1.6-mile hike on Oahu featuring steep wooden railroad ties ascending an ancient volcanic tuff with panoramic island views. The free, 24/7 accessible trail offers a rewarding physical and mental challenge for visitors seeking authentic Hawaiian outdoor experiences.","tags":["koko-crater","hiking","oahu","hawaii","trail","volcanic","adventure"],"key_entities":[{"name":"Koko Crater","type":"location","confidence":0.99},{"name":"Oahu","type":"location","confidence":0.99},{"name":"Hawaii Kai","type":"location","confidence":0.95},{"name":"Hanauma Bay","type":"location","confidence":0.95},{"name":"Diamond Head","type":"location","confidence":0.92},{"name":"Waikiki","type":"location","confidence":0.92},{"name":"Honolulu","type":"location","confidence":0.9},{"name":"Koko Head District Park","type":"location","confidence":0.88},{"name":"World War II lookout post","type":"concept","confidence":0.85}],"classification":"reference","language":"en","confidence":0.85,"provenance":{"model":"claude-haiku-4-5","tool":"@stacklist/be@0.1.0","confidence":0.85,"timestamp":"2026-10-13T14:25:40.941Z"},"token_counts":{"approximate":3339,"cl100k":3208},"content_hash":"sha256:5e6d41d113dae74504d7d3a15ff20166f605cf7ab9d55dc10a3f7a8b8d550407","acp_version":"0.2","body_available":true,"body_tokens":3339,"visibility":"public","agent_accessible":true,"status":"final"},"_links":{"self":"/api/public/card/611d5779-607d-453c-881f-59cfbf2a2d1b.json","html":"https://stacklist.com/card/611d5779-607d-453c-881f-59cfbf2a2d1b","md":"/api/public/card/611d5779-607d-453c-881f-59cfbf2a2d1b.md","stack_json":"/api/public/stack/76467c4b-c4ea-4299-8764-34009edefadb.json"}}