File - In this July 4, 2012 file photo, men's competitors in the annual Mount Marathon race in Seward, Alaska, struggle up the mountain. A rookie's disappearance during a popular extreme race on the mountain has led to new significant new rules in this year's event. Runners in the July Fourth race have to go halfway up Mount Marathon in an hour or they will have to turn around and participants also must sign a statement saying they've completed the entire race course all the way up the 3,022-foot peak. Organizers say the changes were prompted by the disappearance last year of 65-year-old Michael LeMaitre, who was slower than average in his first time on the mountain. (AP Photo/Mark Thiessen, File)

Associated Press
File - In this July 4, 2012 file photo, men's competitors in the annual Mount Marathon race in Seward, Alaska, struggle up the mountain. A rookie's disappearance during a popular extreme race on the mountain has led to new significant new rules in this year's event. Runners in the July Fourth race have to go halfway up Mount Marathon in an hour or they will have to turn around and participants also must sign a statement saying they've completed the entire race course all the way up the 3,022-foot peak. Organizers say the changes were prompted by the disappearance last year of 65-year-old Michael LeMaitre, who was slower than average in his first time on the mountain. (AP Photo/Mark Thiessen, File)
File - In this July 4, 2012 file photo, men's competitors in the annual Mount Marathon race in Seward, Alaska, struggle up the mountain. A rookie's disappearance during a popular extreme race on the mountain has led to new significant new rules in this year's event. Runners in the July Fourth race have to go halfway up Mount Marathon in an hour or they will have to turn around and participants also must sign a statement saying they've completed the entire race course all the way up the 3,022-foot peak. Organizers say the changes were prompted by the disappearance last year of 65-year-old Michael LeMaitre, who was slower than average in his first time on the mountain. (AP Photo/Mark Thiessen, File)
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