BERKELEY, CA – June 23, 2025 — GU Energy Labs, a leader in performance sports nutrition, is proud to announce the extension of its sponsorship of the Western States 100-Mile Endurance Run (WSER) through 2029. This renewed commitment deepens GU’s longstanding partnership with the world’s oldest 100-mile trail race and reinforces both organizations’ shared dedication to endurance athletes, community building, and increasing representation in ultra running.
