The Line Mountain High School is a small, rural public high school located at 187 Line Mountain Road, Herndon, Northumberland County, Pennsylvania. In 2014, the school was reorganized as a 7th–12th grade school. It shares the building with the District's only middle school. In 2014, the enrollment was reported as 365 pupils in 9th through 12th grades. The school is the sole high school in the Line Mountain School District. Line Mountain High School's mascot is the Eagle and their colors are Royal Blue and Gold with a trim of Red.