The A Three Rivers District is a high school conference of the Virginia High School League which draws most of its members from the New River Valley. The lone exception is Glenvar High School, which is located in western Roanoke County. The district is named for the New River, Roanoke River, and Little River. The schools in the Three Rivers District compete in A Region C with the schools of the A Hogoheegee District, the A Mountain Empire District and the A Pioneer District.