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The 38th running of the John Beargrease Sled Dog Marathon is underway. Collected here are a few select photos via Instagram. The 300-mile race is expected to finish on Feb. 1 in the afternoon.

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A post shared by Charlie Smith (@charleshowardsmith_photography)

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A post shared by CODY LAU | Photographer (@photographercody)

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A post shared by Matt Rohlader (@mattrohlader)

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A post shared by Beargrease Sled Dog Marathon (@beargreasesleddogmarathon)

https://www.instagram.com/p/CZYJMwFMr0q/

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A post shared by Tim Mlodozyniec (@muddman4809)

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A post shared by Marcus Asmus Photography (@marcusasmus_photography)

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A post shared by West Epic Visuals (@west_epic_visuals)

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A post shared by Sami Wunch (@s.wunch)

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A post shared by Nicole Pfeifer (@nicole.from.the.north)

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A post shared by Endurance Kennels LLC (@endurancekennels)

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A post shared by Grey Duck Cabin (@greyduckcabin)