{"id":1922,"slug":"great-sand-dunes-dunefield-colorado","story":[{"heading":null,"paragraphs":["Great Sand Dunes are the tallest — the 742 feet that's North America's highest, the Hidden Dune that's the peak. The Pike was the '07 — the 'sea in a storm' that he wrote, the first description that's the record. The PEO was the '32 — the ladies who saved them, the Hoover proclamation that's the monument.","The water was the fight — the AWDI that's the '86 threat, the '00 park that's the expansion. The wind is the builder — the Sangre de Cristo that's the wall, the opposing that's the squeeze. Great Sand Dunes are the formed — the lake that's the Alamosa, the tallest that's the record.","The file keeps Great Sand Dunes: the 742-foot height, the PEO '32, the AWDI fight, and the wind formation.","Great Sand Dunes are the archive's Colorado file — the tallest dunes."]},{"heading":"Why this file matters","paragraphs":["Great Sand Dunes are the archive's Colorado file — the mountain sand.","A dune keeps its height — the file's suggestion being that the Dunes' hold is the fight: the PEO who saved them, the AWDI who threatened, and the wind that built them."]}],"name":"Great Sand Dunes — Dunefield","aliases":[],"type":"DUNE_FIELD","type_label":"Dune Field","cats":["STRANGE_NATURAL_PHENOMENON","UNEXPLAINED","NATURAL"],"groups":["nature","unexplained"],"desc":"Dune field associated with rare humming and booming.","full_desc":"Great Sand Dunes — Dunefield is a dune field in Mosca, Colorado. Dune field associated with rare humming and booming. HauntHunt files it with strange natural phenomena, the unexplained and natural sites. The dossier holds 1 reported claim and 2 documented facts — documented record and retelling kept side by side. The site is open country — visitable, weather permitting.","address":null,"city":"Mosca","county":null,"state":"Colorado","postal":null,"region":"West","lat":null,"lon":null,"coord_kind":null,"status":"NATURAL_SITE","access":"PUBLIC","access_notes":null,"ownership":null,"website":null,"phone":null,"year_built":null,"year_opened":null,"year_closed":null,"year_demolished":null,"designation":null,"current_use":null,"research_notes":"Record targets the park’s dunefield, not every facility or the park boundary. No supernatural interpretation.","stage":"SOURCE_RESEARCH","quality":{"level":"MEDIUM","score":69.4,"dims":{"location_confidence":0.75,"identity_confidence":0.85,"historical_confidence":0.8,"source_quality":1,"paranormal_claim_provenance":0.8,"coordinate_confidence":0,"current_access_confidence":0.7,"freshness":0.65}},"claims":[{"id":4015,"type":"UNEXPLAINED_PHENOMENON","description":"The dunes’ rare booming inspired lore before the acoustic mechanism was understood. The reports at Great Sand Dunes — Dunefield are the site's second history — unofficial, unverified, and stubbornly retold. Sources disagree about it, which makes it honest folklore: contested, retold, unsettled. 'Great Sand Dunes National Park' carries the account. The anomalies are minor and stubborn — which is exactly why they're still in the record.","evidence":"DISPUTED","evidence_label":"Disputed","entity":null,"where":null,"first_report":null,"approx_date":null,"confidence":0.85,"conflict_notes":"The sound is a documented physical phenomenon.","source":{"name":"Great Sand Dunes National Park","url":"https://www.nps.gov/grsa","publisher":"National Park Service","type":"GOVERNMENT","authority":1},"conflicting_source":null,"variants":[]}],"history":[{"description":"National Park Service documents sounds produced by sand movement. The site's documented history is the record the rest of the file stands on. The fact is historically verified — the part of the file that doesn't need hedging. The detail is preserved in 'Singing Sands'. It's the sort of fact that gives the haunting reports their context.","evidence":"HISTORICALLY_VERIFIED","date_start":null,"date_end":null,"confidence":null,"source":{"name":"Singing Sands","url":"https://www.nps.gov/subjects/sound/singing-sands.htm","publisher":"National Park Service","type":"GOVERNMENT","authority":1}},{"description":"The dunefield produces a rare booming sound under specific dry-sand avalanche conditions. Great Sand Dunes — Dunefield's past is on record — the entry belongs to the verified layer beneath whatever lore attaches. The record holds it as fact — documented, not retold. The detail is preserved in 'Great Sand Dunes National Park'. The detail belongs to the verified spine of the entry.","evidence":"HISTORICALLY_VERIFIED","date_start":null,"date_end":null,"confidence":null,"source":{"name":"Great Sand Dunes National Park","url":"https://www.nps.gov/grsa","publisher":"National Park Service","type":"GOVERNMENT","authority":1}}],"legends":[],"entities":[],"events":[],"investigations":[],"encounters":[],"media":[],"persons":[],"visitor":{"tour_availability":"Verify before visiting","notes":"Site access varies; verify before visiting.","last_verified_at":"2026-09-18 11:32:55","source":{"name":"HauntHunt generic access guidance","url":"https://haunthunt.com/about#access-guidance","publisher":"HauntHunt editorial","type":"DIRECTORY","authority":2}},"sources":[{"name":"Singing Sands","url":"https://www.nps.gov/subjects/sound/singing-sands.htm","publisher":"National Park Service","type":"GOVERNMENT","authority":1},{"name":"Great Sand Dunes National Park","url":"https://www.nps.gov/grsa","publisher":"National Park Service","type":"GOVERNMENT","authority":1}],"conflicts":[{"field_name":"short_description","existing_value":"Dune field associated with rare humming and booming.","incoming_value":"The tallest dunes in North America—and their rare booming hum.","notes":"Preserve both source-backed variants; no automatic overwrite."},{"field_name":"full_description","existing_value":"Great Sand Dunes — Dunefield is a dune field in Colorado. Dune field associated with rare humming and booming. National Park Service documents sounds produced by sand movement.","incoming_value":"The Great Sand Dunes dunefield is the 750-foot Sangre de Cristo dune field—the tallest in North America. Under rare dry conditions the slip-faces produce a booming \"singing\" sound, a documented phenomenon.","notes":"Preserve both source-backed variants; no automatic overwrite."},{"field_name":"current_status","existing_value":"NATURAL_SITE","incoming_value":"ACTIVE","notes":"Preserve both source-backed variants; no automatic overwrite."},{"field_name":"research_notes","existing_value":"Record targets the park’s dunefield, not every facility or the park boundary. No supernatural interpretation.","incoming_value":"Lore enrichment; VERIFY task auto-queued.","notes":"Preserve both source-backed variants; no automatic overwrite."}],"wiki":null,"counts":{"claims":1,"history":2,"legends":0,"entities":0,"sources":2}}