Stone Bridge High School, 43100 Hay Road: grades 9-12, 1,591 students in fall 2025, rated Distinguished by the state. Office: 571-252-2200.
Last checked Oct. 19, 2026. Sources: Stone Bridge High School, Loudoun County Public Schools, the Virginia Department of Education’s School Quality Profile, the federal NCES school directory, LCPS’s 2026-27 elementary, middle and high school zone layers and the VHSL alignment.
Stone Bridge High School, at 43100 Hay Road, is the high school for Ashburn Farm and the rest of the Trailside Middle zone, grades 9 to 12. It is one of five Loudoun County Public Schools (LCPS) high schools with an Ashburn address.
Who to call
- Front office: 571-252-2200, 8:30 a.m. to 4:30 p.m.
- Attendance: Absences by email to sbhabsentee@lcps.org
- Enrolling a new student: LCPS Registration Services, 571-252-2490, and online pre-registration
- Which school serves an address: LCPS Planning and GIS Services, 571-252-1050, or the LABEL address lookup
- Buses: LCPS Transportation, 571-252-1700, 6:30 a.m. to 5 p.m. (transportation page)
- LCPS central office: 21000 Education Court, Ashburn, 571-252-1000
| Address | 43100 Hay Road, Ashburn, VA 20147 |
| Grades | 9 to 12 |
| Main phone | 571-252-2200 |
| School day | 9:30 a.m. to 4:18 p.m. on the regular schedule, with a warning bell at 9:24 a.m. |
| Website | lcps.org/o/sbh |
| School division | Loudoun County Public Schools |
Principal
Principal Timothy Flynn, according to the school’s website.
Enrollment and teachers
- State count: 1,591 students in fall 2025, compared with 1,636 in 2024 and 1,703 in 2023, in the School Quality Profile.
- Federal count: 1,697 students in the 2023-24 school year, with 131 full-time-equivalent teachers, according to the NCES directory. That works out to about 13 students per teacher.
State report card
Virginia rates each school two ways on its School Quality Profile. Accreditation shows whether the state has approved the evidence the Standards of Accreditation require. The School Performance and Support Framework gives each school a score and one of four performance levels: Distinguished, Meets Expectations, Approaching Expectations or Needs Intensive Support, as listed in the LCPS division summary.
- Accreditation, 2025-26: Fully Accredited
- Framework score: 97.56, rated Distinguished, in the division summary
- On-time graduation: 97%. Of 417 students in the 2025-26 cohort, 405 graduated on time: 308 with an advanced studies diploma, 90 with a standard diploma and seven with other diplomas. The completion rate was 98%, and seven students dropped out.
Standards of Learning pass rates (end-of-course tests, share of tested students who passed), from the School Quality Profile:
| Subject | 2023-24 | 2024-25 | 2025-26 |
|---|---|---|---|
| English reading | 93% | 95% | 93% |
| Math | 84% | 87% | 90% |
| Science | 82% | 83% | 85% |
The full profile also reports attendance, teacher data and spending.
Attendance zone
The Stone Bridge High zone and the Trailside Middle zone are the same for 2026-27: every address zoned for Trailside Middle goes on to Stone Bridge High. The elementary zones inside it, by share of its 7,456 county address points: Belmont Station Elementary (35%), Cedar Lane Elementary (33%), Sanders Corner Elementary (18%) and Newton-Lee Elementary (14%). Of those address points, 7,456 (100%) carry an Ashburn ZIP code, 20147 or 20148.
Check one address in the LCPS LABEL lookup or on the division’s 2026-27 zone maps, or call Planning and GIS Services at 571-252-1050. Our neighborhoods guide lists the zoned schools for each Ashburn community.
How we checked: we matched Loudoun County’s 140,707 address points against LCPS’s 2026-27 elementary, middle and high school zone layers. LCPS does not publish a feeder list, so the feeder lines and shares are our count; the zone lines are the division’s own.
Calendar and bell times
From the 2026-27 LCPS calendar the School Board adopted:
- Thursday and Friday, Oct. 29-30: no school for students
- Monday and Tuesday, Nov. 2-3: no school (Election Day is Nov. 3)
- Monday, Nov. 9: holiday
- Wednesday to Friday, Nov. 25-27: Thanksgiving break
- Dec. 21 to Jan. 1: winter break; classes resume Monday, Jan. 4
- March 22-26: spring break
- Friday, June 11, 2027: last day of school
The school day runs 9:30 a.m. to 4:18 p.m. on the regular schedule, with a warning bell at 9:24 a.m., according to the school’s website (bell schedules).
Sports and activities
Stone Bridge High plays in Class 5, Region D, Potomac District for 2026-27, according to the VHSL alignment. The district’s other schools are Briar Woods, Lightridge, Potomac Falls and Riverside.
Teams listed on the Stone Bridge athletics site: baseball, boys and girls basketball, cheer, cross country, field hockey, football, golf, gymnastics, boys and girls lacrosse, boys and girls soccer, softball, swimming, boys and girls tennis, boys and girls track, volleyball and wrestling.
Follow the high school teams on our Friday night football page and the high school scoreboard.
More on Ashburn schools
- The school’s own page: lcps.org/o/sbh
- The state’s School Quality Profile for Stone Bridge High
- Every public school in Ashburn, with zones and state ratings
- Our Ashburn schools guide for the calendar, registration and the School Board
Frequently asked questions
What grades does Stone Bridge High School serve?
Grades 9 through 12. The state counted 1,591 students in fall 2025.
How is Stone Bridge High School rated by the state?
It is fully accredited for 2025-26. In Virginia’s School Performance and Support Framework it scored 97.56 and is rated Distinguished.
Which middle school feeds Stone Bridge High School?
Trailside Middle. Every address in its zone goes on to Stone Bridge High.
What time does Stone Bridge High School start?
Classes start at 9:30 a.m.; the school day runs 9:30 a.m. to 4:18 p.m. on the regular schedule, with a warning bell at 9:24 a.m., according to the school’s website.
Who is the principal of Stone Bridge High School?
Timothy Flynn, according to the school’s website.
Have your say