Peter Jackson, 74, went missing on September 17, 2016, while on a solo camping and hiking trip at Yosemite National Park. He had paid for a White Wolf Campground site through September 21 and texted his son that he was on his way to Yosemite that morning; he was not heard from again after that message. His vehicle and campsite at site #58 were found undisturbed, but there was no sign of Jackson or his blue Outdoor Products daypack at the site.

Jackson was an experienced hiker in excellent physical condition who typically tackled moderate to strenuous five-mile routes. An extensive ground and aerial search produced no trace, and the formal search was scaled back by early October 2016. In August 2019 his backpack was found between Aspen Valley and Smith Peak, but otherwise no additional clues have surfaced and the case remains open with authorities believing he may have become lost or injured during his hike.

Did anyone see Peter on the trails near White Wolf, Aspen Valley or Smith Peak in mid-September 2016 or have other information that could help investigators?