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Beau Rasmussen

SAN FRANCISCO -- The mystery surrounding an Emeryville man who vanished after running Bay to Breakers on Sunday only deepened Tuesday, as family and friends from as far away as Oregon and San Diego arrived to hunt for clues but found no sign of the 27-year-old.

No John Does at hospitals matched Beau Rasmussen. A search of jails turned up nothing, as did an extensive search of the coastline from Ocean Beach in San Francisco to south of Pacifica in San Mateo County.

"There was nothing found," his uncle, Kris Rasmussen, said Tuesday afternoon. "Empty beach."

Rasmussen was last seen at noon Sunday, leaving his friends in Golden Gate Park at 30th Avenue and John F. Kennedy Drive, and heading to Ocean Beach. A woman found his passport, cellphone and credit card at 7 p.m.

The worry set in Monday when Rasmussen, a project developer for a renewable energy company in San Ramon, did not show up for work, according to co-workers. Then on Tuesday, a crew cleaning the beach found his clothes -- everything except his underwear -- in the sand, a lifeguard said.

It is widely believed Rasmussen -- like many others who finished the race -- celebrated by jumping into the waves. So far, though, no one has come forward who witnessed him in the water, and lifeguards said they did not see him on the beach.

A gregarious, athletic type whose "apartment looks more like a gym," Rasmussen is an avid hiker and backpacker who has taken survival training courses, friends said. He was supposed to fly to his native Portland on Wednesday to visit his father, stepmother and younger brothers, who are 9 and 5. Rasmussen moved to the East Bay from his company's Portland office two years ago.

"He's responsible, caring and polite," his stepmother Nicole Apelian said. "His brothers worship him," she added.

Rasmussen is white, 6 feet 2 inches tall and weighing 195 pounds. He has brown hair and brown eyes and was last seen wearing jeans and an old maroon football jersey with "Chris" and the number 28 on the back.

More than two dozen friends, family and co-workers picked up the search on Tuesday at 9 a.m., combing the windy beach and sand dunes of Ocean Beach for shreds of evidence. A few hours later they extended the search down the coast to Pacifica, following the Coast Guard's advice on the flow of ocean current on Sunday afternoon. In all, they covered 22 miles.

A lifeguard supervisor said seven rescues were made in the waters off Ocean Beach on Sunday, and lifeguards made 1,000 safety contacts among the crowd of revelers.

"People were just highly intoxicated running into the water. Several of them could barely stand up," said Sean Scallan, 50, a lifeguard supervisor on duty Sunday. "The ocean was a little angry. The untrained eye would never even recognize the danger."

Rasmussen's friends and family are planning a smaller search on Wednesday and are asking anyone with video of the beach after the race or any other information to email find.beaur@gmail.com, call 925-961-7397 or contact Emeryville Police at 510-596-3700.

Kris Rasmussen said he felt "numb" after Tuesday's search. Still, he said, "we'll never give up hope."

Staff writer Erin Ivie contributed to this report. Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund. Contact David DeBolt at ddebolt@bayareanewsgroup.com.