NCAA BASKETBALL
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LionTree Arena
Home of the UC San Diego Tritons
9730 Hopkins Dr
San Diego, CA 92093
Opened: January 1, 1995
LionTree Arena at the Recreation, Intramural, and Athletic Complex (RIMAC) is a sports complex at the University of California San Diego comprising an arena, a weight room and various other event and athletic facilities. It is one of the largest college athletic facilities in the country and it includes LionTree Arena. LionTree Arena is the home arena of the UC San Diego Tritons men's and women's basketball, volleyball, and fencing teams. UC San Diego announced on June 16, 2022 that RIMAC Arena has been renamed LionTree Arena in recognition of a $5 million gift for scholar-athletes.

In 1990, UC San Diego proposed a fee increase of $70 per student to fund a new athletic and event complex. Advocates of the project argued that the existing Main Gym did not have enough aerobic or weight-lifting space to support a rapidly growing university. In addition, Main Gym only seated 2,200 and was rarely available for concerts. The referendum narrowly passed with 51% of the votes, but the results were contested for years.

In September 1991, the Regents of the University of California approved a $33.5 million design by Parkin Architects for the proposed complex, which was architecturally similar to the existing Price Center. Construction began in December 1992, and the facility was completed in December 1994. Upon its completion, RIMAC was the largest NCAA Division III athletic complex in the country and remains one of the largest among all universities.

LionTree Arena is the name used to refer to the 186,000 square foot building that houses both the home arena of the Tritons and the adjacent auxiliary gym. The 44,000 square foot arena itself stands 52 feet tall (45 feet from floor to rafters) and contains six dressing rooms and a 60-by-40-foot-stage, among other facilities. It seats 4,200 spectators in the bleachers for Triton basketball and volleyball home games, expandable to 5,000 through the use of floor seats for concerts.
Last 10 Games
Date Opponents Result
Feb 26, 2026Cal State Bakersfield @ UC San Diego 0 - 0
Feb 12, 2026UC Davis @ UC San Diego 0 - 0
Feb 5, 2026Long Beach State @ UC San Diego 0 - 0
Jan 29, 2026UC Santa Barbara @ UC San Diego 0 - 0
Jan 15, 2026Cal State Northridge @ UC San Diego 0 - 0
Jan 8, 2026Cal State Fullerton @ UC San Diego 0 - 0
Jan 3, 2026Hawaii @ UC San Diego 0 - 0
Dec 28, 2025Stanton @ UC San Diego 0 - 0
Dec 19, 2025San Diego @ UC San Diego 0 - 0
Nov 15, 2025Idaho @ UC San Diego 67 - 75