In what year did the rival school, located in Summerlin, to Durango High School open?
Durango High School (Nevada):  Durango High School's main sports rivals are Bishop Gorman High School and Spring Valley High School. Bishop Gorman High School: Bishop Gorman High School (also commonly referred to as Gorman High School or BGHS) is a Roman Catholic, private, preparatory school located in Summerlin, Nevada. Bishop Gorman High School:  The school opened in 1954 and its mascot is a Gael, or mounted Irish Knight.
i don't know