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National Historic Site · Fort Union Trading Post National Historic Site

Fort Union Trading Post National Historic Site

Best primary window for Fort Union Trading Post: July, with August and September as strong shoulder months.

Between 1828 and 1867, Fort Union was the most important fur trade post on the Upper Missouri River. Here, the Assiniboine and six other Northern Plains Tribes exchanged buffalo robes and smaller furs for goods from around the world, including cloth, guns, blankets, and beads. A bastion of peaceful coexistence, the post annually traded over 25,000 buffalo robes and $100,000 in merchandise.

This page identifies Fort Union Trading Post National Historic Site from the checked-in NPS snapshot and the dated source cards on the page.

TI
Targeted Impressions Data TeamData Science & Intelligence
materializedData snapshot: October 27, 20264 source cards

Answer Brief

Answer-first planning signal

Best current use
Fort Union Trading Post National Historic Site is listed as a National Historic Site in the checked-in NPS identity snapshot.
Current signal
Fort Union Trading Post National Historic Site is listed as a National Historic Site in MT, ND in the checked-in NPS identity snapshot. Official NPS page: https://www.nps.gov/fous/index.htm. Data snapshot: October 27, 2026.
Visitor takeaway
Hours, access, and visitor guidance for Fort Union Trading Post National Historic Site are on the official NPS page at https://www.nps.gov/fous/index.htm.
What it sounds like
Fort Union Trading Post audio on this page is a labeled modeled cue, not a field recording.

Summary at a glance

Fort Union Trading Post National Historic Site is listed as a National Historic Site in the checked-in NPS identity snapshot. 4 source cards on this page. Data snapshot: October 27, 2026.

Designation
National Historic Site
Data snapshot
October 27, 2026
4 source cards
Official NPS
FOUS
Region
rocky mountain
Core Experiences
archeologycommercetradefortsnative-american-heritageArts and CultureCraft DemonstrationsCultural DemonstrationsGuided ToursSelf-Guided Tours - Walking

Month-by-month

Fort Union Trading Post National Historic Site is a National Historic Site. Hours, access, and visitor guidance are on the official NPS page at https://www.nps.gov/fous/index.htm.

Official page

The NPS page for Fort Union Trading Post National Historic Site: https://www.nps.gov/fous/index.htm. Data snapshot: October 27, 2026.

Source cards

4 source cards on this page. Data snapshot: October 27, 2026.

Designation

Fort Union Trading Post National Historic Site is listed as a National Historic Site in MT, ND.

Getting there

Official access details for Fort Union Trading Post are on the NPS page.

Located on North Dakota Highway 1804 right at the Montana and North Dakota state line. From Williston, ND, approximately 25 miles to the southwest via ND Highways 2 & 1804. From Sidney, MT, approximately 25 miles to the northeast, via MT Highways 200 & 58. Commercial flights and rental cars are available in both Williston, ND and Sidney, MT. Amtrak passenger train service and rental cars are available in Williston, ND.

Place instrument

Clock, compare, and listen

Compare places

Season and now

Twelve-month planning is modeled from the published seasonal profile. The current hand stays unavailable until sourced alerts, hours, events, roads, and weather are fresh.

Current hand
Not available

Three listening lanes

Official NPS audio: Not provided for this snapshot.

Synthetic browser audio, never a field recording or live observation.

Jamcorder: Shared station.

Text equivalent for the seasonal place clock
MonthVisitabilityCrowd pressure
January4112
February4312
March4816
April5328
May5746
June5772
July6090
August6086
September5970
October5738
November5018
December4312

The cue is a browser-generated composition, not a field recording. How NPS Sounds modeled audio works.

Methodology

This page uses the checked-in NPS identity snapshot for Fort Union Trading Post National Historic Site, the 4 source cards below, and the figures listed above. Data snapshot: October 27, 2026. Read the NPS Sounds methodology and about NPS Sounds for how pages are assembled.

  • Data snapshot: October 27, 2026
  • Source cards: 4

Data Behind This Reading

Source provenance

NPS identity

high

Fort Union Trading Post National Historic Site is identified as National Historic Site with NPS code fous.

Available · Data snapshot: October 27, 2026

Source

Official operations

limited

Official alerts should be verified on the NPS page. This site uses a checked-in snapshot, not a live operations feed.

From the data snapshot · Data snapshot: October 27, 2026

Source

Weather and seasonality

limited

Fort Union Trading Post National Historic Site is listed as a National Historic Site in the NPS snapshot. Official NPS page: https://www.nps.gov/fous/index.htm. Data snapshot: October 27, 2026.

Modeled · Data snapshot: October 27, 2026

Source

How this page is assembled

limited

place page source cards come from the data snapshot October 27, 2026.

Data snapshot: October 27, 2026

Source

Where Fort Union Trading Post National Historic Site fits

State, region, and designation hubs that list this place.

More Rocky Mountain visit guides

Other source-reviewed places in the same region.