but mostly from the small towns of the Northwest, walk Portland's streets.

Katie's inauguration into the life was like that of countless other girls.

That first day at the strip club, she remembers looking out from the stage.

"It was gross," she told ABC News. "They're like older than my dad and grandpap and I just wanted to go home. "

She was told, "You can't go home, you have to finish your shift," she recalled. "And I was like, 'I don't work here,' and they were like, 'You do now.'"

"I realized I pretty much walked into a trap," she said.

Katie's is a classic case, said Sgt. Mike Geiger, who heads Portland's sexual assault detail. Cute young girls are being targeted by pimps.

"They look for them in the malls, the parks, onwell as affection, said Geiger. "And then the trap has sprung."

Ruth Roberts says that's what happened to her daughter.

"I was a single mom working really late ... making six figures,'' she said. "My daughter was getting A's and B's. Playing basketball. ... She had a good life, a good family, she didn't need anything."

But Roberts' daughter, then 16, met a guy on Portland's subway system. They "dated" and he convinced to her run away and live with him, Roberts said.

Soon, said Roberts, "She was walking the streets."

Forced to stroll Portland's notorious prostitution area around 82nd Avenue, referred to as "the track," even in the bitter cold.

Often, though, according to Roberts, her daughter was "rented" out on Craigslist.com.

Roberts said she spent her life savings trying to find her daughter