Daniel Lynn Campbell, 41, of Big Timber, Montana, disappeared after being dropped off at the Hellroaring Creek trailhead in Yellowstone National Park on April 6, 1991. An experienced outdoorsman and skilled logger, he set out with his one-year-old Australian Shepherd–Blue Heeler mix, Freckles, for a planned roughly 30-mile, multi-day hike to Jardine, Montana, where his girlfriend was to pick him up on April 8. He never arrived and was reported missing.

Campbell was traveling with minimal gear and intended to retrieve elk antlers he had previously stashed; collecting antlers is illegal in Yellowstone. Heavy spring snowstorms struck the region shortly after he began, complicating an extensive multi-agency search by air and ground that found no trace of him or his dog. Investigators and family have advanced several theories, including exposure or accident, voluntary disappearance, and possible foul play — his brothers note reports of gunshots in the area around that time. The disappearance remains an active missing person investigation with Sweet Grass County and Park County Sheriff’s Offices.

Did anyone in the park area in early April 1991 see a man and a small herding dog near Hellroaring Creek or Jardine?