First Bank & Trust Arena is a 5,000-seat multi-purpose arena in Brookings, South Dakota. It was built on the east side of campus in 1973 and is home to the South Dakota State University Jackrabbits men's and women's basketball, women's volleyball, and men's wrestling teams, replacing the Gymnasium-Armory, built in 1918 and nicknamed "The Barn," which still resides on the westside of campus. First Bank & Trust Arena was formerly known as Frost Arena, which was named after former SDSU basketball coach Reuben B. "Jack" Frost.