A wide view of Fort Union Trading Post National Historic Site, a dog-friendly attraction in Williston, ND. Photo by @FortUnionTradingPostNHS.

The sun shining on the pet-friendly Fort Union Trading Post National Historic Site in Williston, ND. Photo by @FortUnionTradingPostNHS.

A boat on display at Fort Union Trading Post National Historic Site, a dog-friendly park in Williston, ND. Photo by @FortUnionTradingPostNHS.

A historical structure at Fort Union Trading Post National Historic Site, a dog-friendly place in Williston, ND. Photo by @FortUnionTradingPostNHS.

A paved pathway to the dog-friendly Fort Union Trading Post National Historic Site in Williston, ND. Photo by @FortUnionTradingPostNHS.

Teepees in fog at Fort Union Trading Post National Historic Site, a pet-friendly historical property in Williston, ND. Photo by @FortUnionTradingPostNHS.

A wintertime walk at Fort Union Trading Post National Historic Site, a dog-friendly historical property in Williston, ND. Photo by @FortUnionTradingPostNHS.

Tents and structures at Fort Union Trading Post National Historic Site, a pet-friendly outdoor activity in Williston, ND. Photo by @FortUnionTradingPostNHS.

Historical belongings at Fort Union Trading Post National Historic Site, a pet-friendly attraction in Williston, ND. Photo by @FortUnionTradingPostNHS.

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Fort Union Trading Post National Historic Site

Fort Union Trading Post National Historic Site in Williston, ND is pet friendly. Bring Fido with you while you explore the reconstructed site of the most important fur trading post on the Upper Missouri River. The spacious property includes lots of grassy space to roam and historical structures & teepees throughout. Dogs are welcome as long as they're leashed and cleaned up after. Visit Website

Or call +1 7015729083 or email fous_socialmedia@nps.gov for more information.

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Fort Union Trading Post National Historic Site is rated 4.5 stars out of 5 by 169 guests on TripAdvisor. Be the first to on BringFido!

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