The Den

The original home of CSUSB men's basketball, women's basketball, and volleyball, is still used by CSUSB Athletics to this day.

The Den is primarily used as a practice facility by the CSUSB teams while also serving as a backup location for athletics events. It offers unlimited flexibility to the CSUSB teams in terms of scheduling, providing a full-service site when scheduling conflicts arise.

In September of 2022, Coussoulis Arena's floor was flooded. As a result, men's basketball, women's basketball, and volleyball played the entirety of their 2022-23 season in The Den.