Loading view. There were no results found. There were no results found. Colgan Sr. High School Events Venues Colgan Sr. High School 13833 Dumfries Rd. Manassas, 20122 United States Get Directions Events at this venue Today Upcoming Upcoming Select date. Previous Events Today Next Events Subscribe to calendar Google Calendar iCalendar Outlook 365 Outlook Live Export .ics file Export Outlook .ics file