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COLORADOAN - Alan Arnette wanted to tackle the world's hardest disease by climbing the world's hardest mountain.

Mission accomplished for the Fort Collins mountaineer.

Arnette reached the summit of K2 on Sunday morning.

Sunday is Arnette's 58th birthday, and he became the oldest American to summit the 28,251-foot mountain, the second highest peak on Earth.

Madison Mountaineering crew member Garrett Madison, Matt Du Puy and Arnette became just the 16th, 17th and 18th Americans to summit K2 and the first since 2007.

Arnette dedicates his climbing to Alzheimer's research and awareness. Through his climbing of K2 and the Seven Summits, he has raised more than $200,000 for Alzheimer's nonprofits.

Read more at the Coloradoan: http://noconow.co/1uveHNl

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