Returning to the very stage where they once stood in line as fans, Boulder’s own 3OH!3 has announced a homecoming headliner at the Boulder Theater for their annual “303 Day” celebration. The March 2026 event serves as a centerpiece for the duo’s ongoing 15th-anniversary festivities for their landmark album, ‘Streets Of Gold’. Sean Foreman and Nathaniel Motte have spent the last year re-energizing their grassroots legacy, following up a massive arena run alongside Simple Plan with fresh singles “SLUSHIE” and “HIT ME HARDER.” While the special guest for the Colorado date remains under wraps, the energy is already high following a string of sold-out anniversary shows in Anaheim and Brooklyn. For a band that built its reputation on the chaotic, high-octane spirit of basement parties on “The Hill,” this theater play represents a full-circle moment, bringing their polished platinum-certified anthems back to the specific streets that first inspired them.