"It was harder on my family than anybody," said Page, who now lives in Cove, Ore. "They were told they didn't know if I would wake up and if I'd have the same personality or abilities I had before."
Her 26-year-old daughter was so moved that she decided to get a medical degree.
Today, at 52, Page is back on Mount Hood, hiking and snowboarding, this time with a helmet. She even coached her son's high school snowboard team, taking them to the state championships.
"Snowboarding feels like being rocked in the cradle; weightless, transcending another world, like floating free," she said of the sport that nearly took her life.
"That's why I got back up there, what drove me. I wanted to feel that feeling again."
Her husband, Dr. John Page, a medical flight surgeon with the Air Force Reserve and private physician, is astounded by his wife's recovery.
"Never in my 25-plus years in emergency room medicine have I seen someone come that close to surviving with the injuries that she had," he told ABCNews.com.
"Now she is pretty much back to normal," he said. "I see other brain trauma injuries and these people do poorly. The whole hypothermia thing played a role."
Marcia Page said that after waking up from her coma, she learned "one of the most important lessons of my life."
"I grew up believing my human worth was based on how productive and useful I could be," she said. "But lying there in my hospital bed, I wasn't able to do a single thing for myself, much less for anyone else.
"It was then, at age 43, as endless care and attention were poured into me while I just laid there damaged and useless, that my value is based on one fact alone: My heart beat."
ABC's Information Specialist Brad Martin contributed to this report.