Search for missing hiker in Boulder County ends after rescue volunteer finds remains Courtesy: Family of Josh Hall Josh Hall, 27, a resident of Arvada, left for a hike at around 9:30 a.m. on Wednesday, Feb. 3, from the Hessie Trailhead with his dog and was reported as missing later that day. His vehicle was found, and his cell phone last pinged near the Devilâs Thumb Trail/Diamond Lake cut-off. and last updated 2021-07-04 00:27:51-04 BOULDER COUNTY, Colo. -- For nearly five months, multiple search-and-rescue teams tried to find missing hiker Josh Hall. "Over 700 volunteer hours spent by professional rescuers on the search itself, and that doesn't even include the amount of overhead, logistics, planning [and] organization that occurred," Rocky Mountain Rescue Group (RMRG) public information officer Drew Hildner said Saturday.