County Fair Guide

Upper Missouri Valley Fair

Williston, North Dakota

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2026 Dates

June 24–28, 2026

Duration

5 days

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Size

medium

Visitor Tips

Williston is at the epicenter of the Bakken shale oil boom — the Fort Union Trading Post National Historic Site marks the great fur trade era at the Missouri-Yellowstone confluence.

What to Expect

Expect livestock judging, 4-H competitions, carnival rides, grandstand entertainment, and the energy-industry and agricultural community spirit of the Bakken oil patch.

About Upper Missouri Valley Fair

Every year, Williston hosts the Upper Missouri Valley Fair, which is a five-day late-June celebration in North Dakota's oil boom capital at the confluence of the Missouri and Yellowstone rivers.

Heading to Upper Missouri Valley Fair?

Our complete packing list covers what actually makes a difference — sun protection, footwear, and the small things people forget until they need them.

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