A look at the Mount Marathon race - from the mountainside.

Hundreds of athletes from around the world -- runners as young as 8 and as old as 80 -- push themselves on a day when most are reaching for seconds at the barbecue.

There is no clear path leading to the 3,000-plus-foot summit. The descent offers no sure footing.

The athletes challenge and inspire one another until the final racer has crossed the finish line.

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