County Fair Guide

Boulder County Fair

Longmont, Colorado

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2026 Dates

August 5–9, 2026

Duration

5 days

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Size

medium

What You'll Find There

Championship livestock competitions, 4-H and FFA exhibits, agricultural competitions including produce and home arts, carnival rides, live entertainment, fair food, and commercial vendors. The fair reflects Boulder County's distinctive mix of conventional agriculture, sustainable farming, and progressive community values.

Local Tips

Held at the Boulder County Fairgrounds in Longmont, about 20 miles north of Boulder via US-36 or Highway 119. Longmont has its own vibrant downtown with craft breweries and restaurants for post-fair dining. August in Boulder County brings reliable blue skies and cool evenings.

The Fair

Held annually in Longmont, the Boulder County Fair is one of Colorado's most attended county fairs, drawing tens of thousands of visitors from both Boulder County's agricultural communities and its large urban population centered in Boulder. It's a rare fair that equally serves organic farmers, university families, and traditional ranchers.

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