Initial surroundings of farm fields have been replaced by housing tracts and the school now possesses one of the most culturally diverse student populations in the region.

Broad Run High School is also located in one of the most affluent zip codes and counties in the country with recorded median income of more than $100,000 per household.

Since then, the county population has increased nearly sevenfold (most of it in the east), straining education budgets, infrastructure, and local politics.

[5] The area's student demographics have significantly changed as well: Loudoun County's residents are now the country's most affluent (per capita),[6] and its ethnic composition continues to diversify as foreign immigration into Northern Virginia increases.

In 2015, Broad Run shifted students who live in University Center and Potomac Farms to Riverside High School in Lansdowne in order to relieve overcrowding.

[17] Broad Run's enrolment was 929 on opening in 1969 (including an 8th grade class)[12] but the county's steady population increases saw accompanying student body expansions, to 1,838 by 2012,[18] periodically relieved as other high schools opened in eastern Loudoun County (Potomac Falls in 1997, Stone Bridge in 2000, Dominion in 2003, Freedom in 2005, and Riverside in 2015).

[20] It has been renovated and expanded many times since its opening in 1969 and is located ½-mile south of Farmwell Road and one mile (1.6 km) north of the Dulles Greenway.

Its principal before Doug Anderson, Edgar T. Markley, a 2003 recipient of The Washington Post's Annual Distinguished Educational Leadership Award,[23] retired after the 2009–2010 school year.

The school's instructional curriculum is set primarily by the LCPS district office based on Virginia Department of Education requirements.

[28][29] Broad Run is a fully accredited high school[30] based on the Standards of Learning (SOL) examinations in Virginia.

[30] To meet the requirements of the federal No Child Left Behind Act (NCLB), the state of Virginia utilizes its Standards of Learning (SOL) examinations as its progress measurement tool.

NCLB requires states to set annual measurable objectives of proficiency in reading and mathematics, participation in testing, and graduation and attendance.

[31] The percentage of students passing the English and Math tests at Broad Run averages higher than Loudoun County as a whole, but lags slightly behind in Science by three points.

[35] Christy Anch, pitcher for the Lady Spartans from 1999 to 2002, personally holds 22 individual state records in the Virginia High School League.

[37] Ranked fifth in the nation by USA Today[38] with a 29–0 record, the Lady Spartans defeated New Kent County High School for the championship behind Caitlyn Delahaba's pitching (no-hitter, 12 strikeouts).

[41] In 2007, the Spartans had a perfect 10–0 regular season, winning the district championship, but lost to rival Park View High School in the first playoff round.