Colorado State University's annual 'Undie Run' is Friday

Photos: 2018 Undie Run at Colorado State University

Cupid's Undie Run - Cupid's Undie Run

Undie Run 2023 part 1 Thank y'all for showing up and keep sending

Colorado State University officials ask students to avoid annual

University of Oregon students strip down for charity Undie Run

Colorado State University's annual 'Undie Run' is Friday

Thousands of students strip for end-of-the-year CSU Undie Run

Undie Run 2023 part 1 Thank y'all for showing up and keep sending

BARE at CSU - Event formerly known as the Undie Run

CSU Undie Run Videos: Hundreds Strip, but Attendance Down

Colorado State University Undie Run lives on in 2019