What to Expect
Expect livestock judging, 4-H competitions, carnival rides, and the working-class mining and ranching community spirit of the Silver Bow corridor.
About Jefferson County Fair
The Jefferson County Fair in Boulder is a four-day August celebration in the Jefferson River valley, serving the ranching and mining heritage communities between Helena and Butte.
Visitor Tips
Boulder is between Helena and Butte in the Jefferson River valley — the area's copper and silver mining legacy and the Elkhorn ghost town are distinctive local features.
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