The climbers who likely died on snow-capped Mount Rainier in Washington state this week travelled from as far as Singapore and Minnesota to ascend the 14,410-foot glaciated peak.

The mountain, southeast of Seattle, is popular with climbers of all abilities, but the victims in last week's climbing accident — two guides and four clients — were experienced climbers who were taking on a more technical and challenging route.

The identities of the two guides from Seattle-based Alpine Ascents International were released on its website Monday. The company and Mount Rainier National Park have refused to release other names, citing privacy issues, but family members and colleagues have released details on three other climbers.

Intel Corp. spokesman Bill Calder confirmed Monday that his colleague Uday Marty, a vice president and managing director of Intel in Southeast Asia, was among the group of climbers.

Marty, who was based in Singapore, was "widely loved and respected at this company," Calder told The Associated Press.

"We are most definitely mourning his loss here," he said. 

Missing Rainier Climbers

Mount Rainier as seen from the White River Campground, where the six climbers attempting to summit went missing. (Bettina Hansen/Associated Press)

According to his biography on Intel's website, Marty, 40, managed sales and marketing in the region and had previously managed global notebook marketing out of the company's headquarters in Santa Clara, California. He joined the company in 1996.

"He was a guy with a great attitude, and he always had a big smile," Calder said.

Alpine Ascents identified the two guides on its website. Matthew Hegeman, the lead guide, was described as intense and philosophical with a good sense of humour. Eitan Green, the other guide, loved his time in the mountains and was a strong leader and quick to smile, the website said.

Officials at Maine's Colby College said Green was a 2009 graduate who majored in anthropology. A memorial service for the Massachusetts native is scheduled for Thursday in Levine Chapel in Brookline, Massachusetts.

The Seattle Times reported Monday that Seattle mountain climber John Mullally was one of the six who died. His wife, Holly Mullally, issued a statement Monday saying that she had previously been on climbs organized by the company.

"John was an amazing husband, father, friend, mountaineer, and all around human being," Holly Mullally wrote.

Rob Mahaney told The Associated Press that his 26-year-old nephew, Mark Mahaney, of St. Paul, Minnesota, was among those presumed dead. He said the climber's father and brother flew to Seattle on Saturday after learning what happened. Mahaney said his nephew had climbed Rainier before.

Hazardous terrain

Park rangers and rescuers often are able to retrieve bodies within days of an accident, but sometimes it takes weeks or months, when conditions have improved and snow has melted on parts of the mountain.

But the six bodies may never be recovered because of the hazardous terrain, authorities say. 

Missing Rainier Climbers

'The mountain is so inaccessible and can be inhospitable. We can't always retrieve everybody who is lost there, unfortunately,' said Patti Wold, a spokeswoman with Mount Rainier National Park. (Lui Kit Wong/Associated Press)

It's unclear whether the climbers were moving or camping at the time of the accident. Searchers located camping and climbing gear and detected signals from avalanche beacons buried in the snow at the top of the Carbon Glacier at 9,500 feet in elevation.

It's also not known what caused the climbers to fall from their last known whereabouts at 12,800 feet on Liberty Ridge — whether it was rock fall or an avalanche. They were last heard from at 6 p.m. Wednesday when the guides checked in with Alpine Ascents by satellite phone. The group failed to return Friday as planned.

More on the five identified missing climbers: 

Matt Hegeman 

More than 100 people commented on Alpine Ascents' Facebook page remembering the lead guide on the Mount Rainier journey, who was a resident of Truckee, California. Hegeman led climbs throughout northern California and had done extensive rock climbing throughout the state, the company said.

"Matt, intense, philosophical and driven by the right way to do things, left an indelible mark on all around him. His pursuit for excellence was matched by his sense of camaraderie and humour," the company wrote on its website.

Holly Mullally, wife of one of the victims, issued a statement to The Seattle Times on Monday saying she had climbed with Hegeman.

"I respected his leadership and found him to be experienced, skilled, appropriately conservative, thoughtful, and someone who I could count on to keep my husband safe, barring tragedy beyond our control," she wrote of the guide.

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Eitan Green

He started his career as a mountain guide after receiving a degree in anthropology at Colby College in Maine, according to Alpine Ascents and the college.

Green worked at the climbing company since 2009 and climbed, trekked and guided trips all over the world, including in India, Nepal, Alaska and Argentina, the company's website said.

"Eitan, quick with a smile and exuberant, had that infectious nature of guides who love their work and time in the mountains. His talent as a strong leader and critical thinker in the wilderness was unsurpassed," Alpine Ascents officials wrote on the groups' website.

Colby College spokesman Steve Collins said the Massachusetts native graduated in 2009 and was a member of the college mountaineering club. A memorial service is scheduled for Thursday in Levine Chapel in Brookline, Massachusetts.

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John Mullally

The Seattle mountain climber "died doing what he loved," according to his wife's statement to The Seattle Times.

"John was an amazing husband, father, friend, mountaineer, and all around human being," Holly Mullally wrote. "John lived to climb mountains, and had his first summit of Mount Rainier in his early 20s. Although my heart is broken, I find peace in the knowledge that he died doing what he loved."

She wrote that her husband was a "truly self-made man" who worked at Microsoft for more than 20 years, starting in the manufacturing division in his late teens, working his way up to program manager in the Windows division.

Besides his wife, John Mullally is survived by his parents, two sisters and two daughters, ages 5 and 9. Holly Mullally wrote that an educational memorial fund will be set up on their behalf.

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Mark Mahaney 

Even as a toddler, Mahaney had a knack for climbing. The St. Paul, Minnesota, man often tried to get out of his crib or would climb on his parents' table, said his uncle Rob Mahaney.

He said his nephew's passion for scaling things brought him to Washington state last week to attempt his second ascent of Mount Rainier.

"He loved the outdoors, he loved the exhilaration of being in the wide open," Rob Mahaney said.

The 26-year-old graduated from Prior Lake High School southwest of St. Paul and then moved to St. Paul, where he became a quality-assurance analyst for a high-tech company. He was the youngest of five children.

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Uday Marty

Marty, a vice-president and managing director of Intel Corp. in Southeast Asia who was based in Singapore, was a seasoned climber who made annual treks, colleague and Intel spokesman Bill Calder said.

Missing Rainier Climbers

Uday Marty, one of the six climbers presumed dead after a fall on Mount Rainier, was a vice president of Intel Corp. in Southeast Asia. (AP Photo/Intel Corp.) (Intel Corp./Associated Press)

Calder says other friends told him that Marty had climbed Rainier before. He said that Marty was "widely loved and respected at this company."

"We are most definitely mourning his loss here," Calder told The Associated Press. According to his biography on Intel's website, Marty managed sales and marketing in the region and had previously managed global notebook marketing out of Intel's headquarters in Santa Clara, California. He joined the company in 1996.

"He was a guy with a great attitude, and he always had a big smile," Calder said.