Boulder Events in September

Events in September in Boulder

Here’s your guide to all the happening concerts, festivals and events in September 2025 in Boulder. Catch the best of everything that your city has to offer here. Right from the flea market events to all the festivals; the September 2025 events in Boulder is all curated and sorted for you. Get going, buy your tickets and register to all the fun and exciting events already!

Events in September in Boulder

Sat, 26 Sep, 2026 - 10:00 AM

Voices of Care 2025

Main Library - Boulder Public Library District

Free
Fri, 11 Sep, 2026 - 05:00 PM

Colorado Buffaloes vs. Weber State Wildcats

Folsom Field
Wed, 02 Sep, 2026 - 07:00 PM

Sports Night

The Church of Jesus Christ of Latter-day Saints
Sun, 06 Sep, 2026 - 02:00 PM

YSA Linger Longer

The Church of Jesus Christ of Latter-day Saints