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March ultramarathons in North Dakota, United States

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1 races

Cobscook Backyard Ultra

Mar 27-Apr 25, 2027 (Sat-Sun)

Edmunds, North Dakota, United States

Repeated hourly loops on quiet, vehicle-free gravel roads in Cobscook Bay State Park, with a self-reliant, no-aid-station format.

50K

81K

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March ultramarathons in North Dakota, United States

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Cobscook Backyard Ultra