Daniel Joseph Marks, 24, disappeared in Kauai in November 2005 after setting out alone on a hiking and camping trip. He was last seen the afternoon of November 10 at the second Kalalau lookout on the Pihea Trail above Waimea Canyon. At the time he was believed to be carrying a small backpack, possibly with tent poles, and he had a flight scheduled for November 16 that he never boarded.

Search and rescue conducted aerial and ground searches in the rugged terrain around Pihea Trail and Waimea Canyon, but found no trace of Marks, his gear, or remains. Reports say he had stayed at a hostel the night before and had traveled to Kauai after an invitation from someone named Miko from Maui. His family and investigators consider a hiking accident or fall likely, and his mother has noted he previously suffered two concussions with resulting memory loss and has suggested amnesia as a possibility. Some reported sightings after his disappearance were never confirmed.

Does anyone who visited the Pihea Trail or Waimea Canyon area in November 2005 remember seeing Daniel or his backpack?