Byron Nelson High School is a public high school located in Trophy Club, Texas about 20 miles (32 km) north of Fort Worth, Texas, in Denton County and opened in August 2009 for the 09–10 school year. It is the second high school in the Northwest Independent School District. It cost around $69 million, making it the 69th most expensive and state of the art high schools in the state. It is approximately 504,000 square feet (46,800 m2), with a 32,000-square-foot (3,000 m2) courtyard in the middle. It is built along the property of the Army Corps of Engineers, along the edge of where Denton Creek flows into Lake Grapevine at the lake's southwestern corner. In 2013, the school was rated "Met Standard" by the Texas Education Agency. In 2019, Byron Nelson High School earned an "A" according to TE