SEATTLE — Esteemed climber Jim Whittaker, renowned for being the first American to conquer Mount Everest, has passed away at the age of 97.

Whittaker, who notably became the inaugural full-time employee at outdoor retail giant REI before ascending to the roles of president and CEO, died on Tuesday in his Port Townsend, Washington residence, according to a statement released by his family.

“Whether at home, in the mountains, or at sea, he sought to share adventure, joy, and optimism with those around him,” the statement read, as shared by his son, Leif Whittaker. “His warmth, humility, and belief in the power of nature to bring people together left an enduring legacy of care for our planet and for one another.”

Whittaker’s historic 1963 Everest ascent with Nawang Gombu occurred a decade after the iconic climb by Sir Edmund Hillary and Tenzing Norgay. This achievement sparked a surge of interest in mountaineering across the U.S., transforming the once-reticent climber into a national icon. He graced magazine covers and was sought after for speaking engagements.

Starting his career with REI in 1955 under the guidance of co-founder Lloyd Anderson, Whittaker saw the company’s popularity soar following his Everest triumph. From 1971 to 1979, he led the company, during which membership skyrocketed from around 250,000 to over 900,000, as highlighted by REI in a statement on Wednesday.

His advocacy, including impactful congressional testimonies, played a crucial role in the establishment of the North Cascades National Park and the Pasayten Wilderness in Washington, along with California’s Redwood National Park.

“Long before outdoor advocacy was commonplace, Jim gave his voice — and his leadership — to protecting the places we love, reminding us that wild places endure only if we choose to care for them,” the statement said.

Whittaker’s celebrity also brought him into the orbit of the Kennedy clan, and he became a close friend of Robert Kennedy, with whom he climbed a 14,000-foot (4,267 meters) Canadian peak. The peak was later named Mount Kennedy after the presidential contender’s murder in 1968.

Whittaker was at Kennedy’s bedside when he died and was devastated by the assassination.

Whittaker grew up in Seattle and began climbing with his twin brother Lou Whittaker in the 1940s with the Boy Scouts. At 16, they summited 7,965-foot (2,428-meter) Mount Olympus, the highest peak in the Olympic Mountains west of Seattle, Jim Whittaker recounted in his memoir, “A Life on the Edge.” When they reached the town of Port Angeles on their way home, they found cars honking and people celebrating: World War II had ended.

Jim Whittaker once reflected that the beauty and danger of his sport sharpened the senses: “When you live on the edge, you can see a little farther,” he once reflected.

His achievements on the remote, snowy slopes of Mount Everest and nearby K2, the world’s second-tallest peak, assured him a niche in the record books. He was shocked when Lou decided to skip the 1963 Everest expedition in favor of opening a sporting goods store in Tacoma.

But Lou Whittaker wrote in his own book, “Lou Whittaker: Memoirs of a Mountain Guide,” that he still got to share in some of his twin’s glory by filling in when Jim got tired of attending parades or other events in his honor.

“Only our families and closest friends ever knew the difference,” he wrote.

Lou Whittaker died in 2024 at age 95.

Jim Whittaker led many additional climbs, including the 1990 Mount Everest International Peace Climb, which brought together climbers from the U.S., the Soviet Union and China “to demonstrate what could be accomplished through cooperation and goodwill,” the family statement said.

“Jim was a lifelong advocate for peace and believed deeply in the ability of shared challenges in the natural world to unite people across borders and ideologies,” it said.

Whittaker himself said one of his proudest moments came in 1981, when he led 10 handicapped climbers up 14,410-foot Mount Rainier. For them, he said later, “that was Mount Everest.”

Whittaker scaled Mount Rainier more than 100 times but did not take its familiar flanks for granted. The caprices of the weather, even on a comparatively modest mountain, “can turn a good climber into a beginner” in a matter of hours, he once noted.

Former Washington Gov. Jay Inslee called Whittaker’s legacy “just as impressive, and just as lasting, as Mount Rainier itself.”

“He pulled many a climber up the peak,” Inslee wrote in a social media post Wednesday. “He did the same for all our spirits. He still does.”

After years of risk on the world’s most dizzying pinnacles, Whittaker said in a 1980 interview that he hoped to “die in my sleep with the television on.”

He is survived by his wife of 52 years, Dianne Roberts; sons Bob, Joss and Leif Whittaker; three grandchildren; and one great-grandchild.