Boulder-based Outside Interactive Inc., in partnership with Green Disco, released its sustainability impact report from the 2025 Outside Festival and Summit on Wednesday, and the numbers tell an impressive tale about how the company is handling the growing event after year two.

According to the outdoors media company, the report underscores the brand's commitment to scaling a sustainable and low-emissions event.

The 2025's Outside Festival saw nearly doubled attendance numbers from the inaugural event in 2024, with measuring the event’s environmental impact still a primary focus for organizers, which resulted in a triple-reduced carbon footprint.

“We are proud of the progress we continue to make across our sustainability indicators year over year,” Robin Thurston, CEO of Outside Interac

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