LoanMart Field is a stadium in Rancho Cucamonga, California. It is primarily used for baseball and is the home field of the Rancho Cucamonga Quakes minor league baseball team. It was opened on April 3, 1993, with the nickname The Epicenter, and has a seating capacity of 6,588 people. While playing home games at the stadium since 1993, the Quakes have broken a number of stadium attendance records.