{"schema":"postcutoff/event@1","as_of":"2026-10-09T19:24:00+02:00","url":"https://postcutoff.com/e/2026-10-03-claude-hiking-route-teen-stranded-crown-mountain/","md":"https://postcutoff.com/e/2026-10-03-claude-hiking-route-teen-stranded-crown-mountain/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"Adam Bicz","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-10-03-claude-hiking-route-teen-stranded-crown-mountain","date":"2026-10-03","date_precision":"day","short_title":"Teen following a Claude-planned route is stranded below Crown Mountain's 'Widowmaker' in B.C. and rescued by rope team","deck":null,"takeaway":"On Saturday Oct 3, 2026 a 16-year-old who had asked Claude to plan a hike from Grouse Mountain to Crown Mountain (North Vancouver, B.C.) was led off-trail and got stuck at the base of the Widowmaker Arete's final headwall.","category":"policy-safety","category_label":"Policy & safety","importance":2,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":[{"n":1,"title":"CTV News Vancouver (James Paracy): Teenager rescued from B.C.'s 'Widowmaker' after getting stranded using AI instructions (Oct 5)","url":"https://www.ctvnews.ca/vancouver/article/teenager-rescued-from-bcs-widowmaker-after-getting-stranded-using-ai-instructions/","type":"press","group":"press","domain":"ctvnews.ca"},{"n":2,"title":"MobileSyrup: B.C. teen stranded on cliff after following AI route plan (Oct 5)","url":"https://mobilesyrup.com/2026/10/05/bc-teen-cliff-stranded-ai-route-plan/","type":"press","group":"press","domain":"mobilesyrup.com"},{"n":3,"title":"Futurism: Teenager stranded on mountain after following AI instructions (Oct 6)","url":"https://futurism.com/artificial-intelligence/teenage-stranded-mountain-ai-instructions","type":"press","group":"press","domain":"futurism.com"},{"n":4,"title":"Cybernews: Claude hallucinated route down 'Widowmaker' mountain, leaving teen stranded","url":"https://cybernews.com/ai-news/claude-teen-widowmaker-mountain/","type":"press","group":"press","domain":"cybernews.com"},{"n":5,"title":"Gizmodo: Teen left stranded on a cliff after letting AI plan hike","url":"https://gizmodo.com/teen-left-stranded-on-a-cliff-after-letting-ai-plan-hike-2000821835","type":"press","group":"press","domain":"gizmodo.com"},{"n":6,"title":"The Guardian: A teen tried to navigate Canadian mountains with Claude. His trek ended in an emergency rescue (Oct 8)","url":"https://www.theguardian.com/world/2026/oct/08/teen-hike-claude-ai-directions-rescue-canada-mountain","type":"press","group":"press","domain":"theguardian.com"}],"official":0,"filed":"2026-10-09","updated":"2026-10-09","orgs":["Anthropic","North Shore Rescue"],"title":"Teen following a Claude-planned route is stranded below Crown Mountain's 'Widowmaker' in B.C. and rescued by rope team","summary":"On Saturday Oct 3, 2026 a 16-year-old who had asked Claude to plan a hike from Grouse Mountain to Crown Mountain (North Vancouver, B.C.) was led off-trail and got stuck at the base of the Widowmaker Arete's final headwall. North Shore Rescue lowered two technicians from a helicopter and extracted him by about 6:30 p.m.; its search manager warned hikers not to follow AI-generated routes.","key_facts":["Timeline (CTV News via search summaries): rode the Grouse Mountain gondola at about 8 a.m.; NSR called at about 3:30 p.m.; extracted by about 6:30 p.m.","Route: Claude sent him down Crown Pass and up through Crater Slabs and Crown Couloir before the directions left the trail route; he called for help from the base of Widowmaker Arete's final headwall","Rescue: he was too close to the vertical wall for the helicopter; two rescue techs were lowered above him, set an anchor and belayed to him","Paul Markey (NSR search manager): 'Claude has never been in that specific area, has never been on that route, and has never been in the outdoors'; 'A fall would have resulted in significant injury or potentially death'","Which AI: CTV and Futurism name Claude; MobileSyrup's write-up said the platform was not specified. No Anthropic comment found (as of Oct 9)","Day: reports (published Mon Oct 5) say Saturday afternoon, i.e. Oct 3, 2026 (derived)","The Guardian (Oct 8) took the story international: the rescue team's debrief found him 'far off' his intended route at the headwall of the Widowmaker Arete, which needs ropes and cams; it calls the case believed to be the first time a hiker was lost because of AI, after a July rescue of three people misled by Google Maps time estimates on the Howe Sound Crest Trail. Markey: 'do not blindly rely on AI as a route planning tool'"],"key_numbers":[],"tags":["incident","real-world-harm","hallucination","outdoor-safety","claude","consumer-ai"],"science":null,"body_md":"## What happened\n\nA teenager used Claude as a route planner for a demanding North Shore mountain traverse. The model produced a plausible-sounding\nsequence of named features that took him off the established route into cliff terrain, where he had to be roped out by a volunteer\nsearch-and-rescue team. The story spread from CTV to tech and consumer outlets during Oct 5–9.\n\n## Why it matters\n\nIt is a concrete, widely reported case of physical-world harm from confident chatbot advice on local terrain the model cannot know\nwell. Rescue groups now explicitly warn against AI-generated routes, and Futurism notes an earlier (Sept 2026) rescue of hikers who had\nfollowed Google AI advice on supplies (not yet verified here).","disputed":[],"related":[],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-10-09","type":"edit","text":"Added The Guardian's Oct 8 report"},{"date":"2026-10-09","type":"filed","text":"Created from 2026-10-07 lead"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-10-09","run":null,"sources_read":"2026-10-07 lead","updated":"2026-10-09","human_review":null,"version":null},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":156,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":95,"in_training_data":false},{"model_id":"gemini-3-8-flash","name":"Gemini 3.8 Flash","cutoff":"2026-03","days_after":186,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":125,"in_training_data":false}],"short_url":null}