The search for Jason Coughran entered its seventh day on Saturday as 192 personnel kept working through Desolation Wilderness near Lake Tahoe, where the 60-year-old hiker was overdue from a trip and still had not been found.

The scale of the effort has grown fast because the trailhead question remains the same: where is Coughran, and what condition is he in? The California Office of Emergency Services said the volunteers came from 20 different counties, while the El Dorado County Sheriff’s Office said the operation included field search teams and incident management personnel.

Coughran had last been seen near Fallen Leaf Lake, a detail that has helped focus crews in a vast wilderness area where even a strong search plan can be swallowed by terrain and distance. El Dorado County Sheriff’s Office Search and Rescue had been in the field since Monday, keeping the case active as the search moved deeper into the week.

On Saturday, May 30, 80 search and rescue volunteers were inserted into Desolation Wilderness by an Air National Guard CH-47 Chinook Helicopter, while another 60 reached the search area by vehicle. Those moves show how aggressively the operation has been pushed, but they also underline the limits of the terrain: despite the buildup, Coughran remained missing.

Fifty search and rescue personnel stayed overnight in Desolation Wilderness as the effort continued, with multiple agencies and community partners still involved. For now, the search is defined by its size and its silence: a large, coordinated response, and no sign yet of the man it is built to find.