Солтүстік Дакота Университетінің Ральф Энгельстад Аренасы

Indoor ice hockey arena at the University of North Dakota

The REA complex has evolved to include more than just the main arena. A second Olympic sized sheet of ice sits adjacent to the main arena. An addition to the main arena, The Betty Engelstad Sioux Center (or simply The Betty) was completed in 2004 and is now the home of UND's basketball and volleyball teams. Although located on the campus of the University of North Dakota the arena and land itself is owned by The Engelstad Family Foundation and rented conditionally to UND each year for $1. This setup was created to give the Engelstad family control and final say regarding the facility. In 2015 the Ralph Engelstad Arena received a certificate of excellence from Trip Advisor for being one of the top rated destinations in America. In 2019 the REA announced they would install a new $6 million scoreboard. It was unveiled June 26, 2019 and is considered one of the best scoreboards in the country. Numerous other upgrades were completed including a new LED ribbon display wrapping around the entire arena. During the COVID 19 pandemic the Ralph was being considered by the NHL to potentially host playoff games due to North Dakota's low population density and the high quality of the REA.

Midway during construction, Ralph Engelstad threatened to withdraw his funding if UND's Fighting Sioux sports teams were renamed in deference to political pressures. In an effort to make the prospect of removal a prohibitively costly measure, the Fighting Sioux logo was strategically placed in thousands of instances in the arena, including a large granite logo in the main concourse. After the three years expired, permission was obtained from only one of the two Sioux tribes. The North Dakota Legislative Assembly passed a law requiring the University to retain the name in June 2011, but then repealed the law in November 2011. A statewide vote was held in June 2012, and the citizens of North Dakota voted to discontinue the Sioux name, and on October 22, 2012 crews removed signage that declared "Home of the Fighting Sioux" from the face of the building. The 2012 vote also banned UND from choosing a new name for three years. After the nickname ban expired in 2015, the university held two rounds of online fan voting from a suggested list of nicknames; the final selection of Fighting Hawks was adopted in November of that year.

The REA's inaugural hockey game was on October 5, 2001 and featured the Fighting Sioux men's team against the WCHA rival Minnesota Golden Gophers in the US Hockey Hall of Fame Game, in which Minnesota defeated North Dakota, 7–5. The REA hosted the West Regional in the 2006 NCAA Men's Division I Ice Hockey Tournament, with North Dakota playing in its home building. The REA has hosted a number of non NCAA ice hockey events, notably the 2005 World Junior Ice Hockey Championships with over 195,000 tickets sold and the 2005 NCAA Men's Division II Basketball Championship. The Minnesota Wild and Winnipeg Jets have played several exhibition games at the arena as well. REA also hosted the 2008 World Men's Curling Championship, along with family friendly ice shows such as Stars on Ice and Disney's High School Musical On Ice. The REA hosted the 2016 IIHF World U18 Championships. Non ice events at the REA have included concerts, by artists such as Tim McGraw, Brad Paisley, Sugarland, Kenny Chesney, Rascal Flatts, Toby Keith, Kelly Clarkson, Reba McEntire, Carrie Underwood, Clay Aiken, Incubus, Elton John, Eric Church, Little Big Town, and Florida Georgia Line, and a tennis match between Andre Agassi and Andy Roddick.