Quinn Coliseum is a basketball and volleyball arena in La Grande, Oregon which serves as the home for the Eastern Oregon Mountaineers. It was constructed in 1958 with a "wing" architecture theme. In 2007, Quinn Coliseum was renovated, which included a new bleachers, energy efficient lighting, and new indoor softball batting cages. Quinn Coliseum hosted amateur boxing matches in the 1980s. In 1986, a drowning occurred in the deep end of the pool facilities. John Norton, 45 of Baker, was discovered at the bottom of the pool by a lifeguard and was unresponsive to revive him. Quinn Coliseum is currently being rebuilt by SERA Architects from Portland.
Quinn Coliseum seats 1,200 people.