Capacity:13,390 Opened: 1982 ExtraMile Arena is the home of the Boise State Bronco basketball and gymnastics programs, as well as concerts, university and community commencements, and other events. This multipurpose arena is equipped with a new state-of-the-art video and sound package complete with: hollow center hung video board allowing rig-through, new ribbon boards, ADA compliant closed-caption boards and a concert-grade L'Acoustic sound system.