BSides Colorado Springs 2025 is a nonprofit, community-driven cybersecurity conference focused on delivering high-quality, hands-on, and deeply technical content — all with a Halloween twist. Now in its third year, the event brings together students, professionals, red teamers, blue teamers, and the curious for a full day of talks, workshops, CTFs, and a horror-themed after party. Taking place on October 25, 2025, at the University of Colorado Colorado Springs, BSides COS is free to attend thanks to our generous sponsors and dedicated volunteers.