Climber declared missing after search through Eastern Sierra peaks

Rescuers in the rugged Eastern Sierra are searching for a Seattle man who has been missing since early September — and possibly longer — after climbing among some of California’s most remote and daunting mountain peaks.

Billy Pierson, an experienced alpinist, was in California getting in shape for an upcoming trip to Nepal, according to a comment his brother, Steve Pierson, left on Facebook.

On Aug. 9, the alpinist was hiking with a friend. “After their hike, he separated from that friend and is believed to have headed toward Inyo County,” the Inyo County Sheriff’s office said in a news release. “He was later reported missing on September 10, 2025.”

It was not immediately clear when Billy Pierson separated from his friend, or who was the person who reported him missing. The Inyo County Sheriff’s office did not immediately respond to a request for comment Monday.

It is believed Pierson was attempting the Palisades Traverse, a classic and technical mountaineering route along the Sierra crest that covers close to 20 miles and crosses the summits of five mountains taller than 14,000 feet.

In addition to climbing the challenging peaks, mountaineers also often have to navigate the Palisades Glacier, one of the last true glaciers remaining in California.

Steve Pierson said his brother’s plan was to begin, or end, his epic trip at Temple Crag, a familiar landmark to seasoned Sierra climbers and hikers that towers above the magnificent, glacier-fed Big Pine Lakes.

The Inyo County Sheriff’s office, working with Inyo County Search and Rescue, scoured the area around Temple Crag with no success.

Pierson is 5’9”, 165 lbs, and was last known to be carrying a large, navy blue or gray backpack. He was wearing black and yellow shoes and liked to hike in a baseball cap with a bandana underneath.

News that Pierson is missing follows several other incidents this summer in which hikers got dangerously lost or were found dead.

On Sept. 12, an Argentinian climber fell 2,000 feet to his death on Mt. Shasta. The 45-year old tech executive had summited successfully, but lost his way on the descent, winding up on the steep and icy Wintum Glacier. He attempted a controlled slide to reach the safety of a trail below, but lost control, collided with a boulder, and eventually slid the length of the glacier.

Also in September, a San Luis Obispo County man — Kirk Thomas-Olsen, 61 — was found dead in Yosemite National Park more than 20 days after he was expected to return from his solo hike.

In August, a boy scout troop hiking in the Emigrant Wilderness north of Yosemite National Park came upon a 78-year old man who had spent a night without food, water or shelter in the mountains. He had lost his pack and seemed incoherent when the scouts found him and escorted him to safety.