Avid Marathoner News Today

>> reporter: on the same day during her descent, this woman took her final breaths. she had trained for six years. she had trekked for 25 years and she was an avid marathoner. her son says that she collapsed and died while caught in the human traffic jam coming down the mountain. a picture taken on the day of their deaths may 22, shows a long line of trekkers on the ridge of the summit in an area known as the death zone. it has raised concerns about the possible dangers of congestion on everest....

She had trekked for 25 years and she was an avid marathoner. her son tells cnn she collapsed and died while caught in a human traffic jam while coming down the mountain. a picture from that day shows a long line of trekkers in the area of whats called the death zone. >> i think you would have to be foolish to say that queueing or that waiting in high altitude isnt having some impact on the numbers of deaths weve seen this year. >> reporter: nepals tourism board says more than 200 mountaineers as...

This season. and some of the fatalities are being blamed on a human traffic jam. alexander field explains. >> reporter: for donald cash, it was the final frontier, the summit of mount evet. everest, position achievement for the 55-year-old who had met his life long goal, reaching the top of every mountain on every continent. but it would be his few last minutes. cash died of high altitude sickness. >> he fell on the way down just below the summit. and then they kind of carried him down, helped h...