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Try one (or all) of these epic fitness challenges this month.
A manifesto for getting out and seeing the world.
25 of the Golden State's best outdoor challenges to tackle.
Sam Fox shares some great shots along his 103-day journey.
More like troubled sands; researchers find fecal bacteria on beaches.
Scott Jurek completed the Appalachian Trail in just over 46 days.
In "nature's toughest challenge," runners race around Mont Blanc.