Before the opening of Woodgrove High School in 2010, it was the sole high school for the western half of Loudoun County (which includes Purcellville, Hamilton, Round Hill, Lovettsville, Hillsboro, Middleburg, Philomont and Bluemont).

Throughout its history, Valley has remained a predominantly rural high school, maintained a small enrollment of roughly 800 students, and did not experience much of the sprawl that eastern Loudoun County experienced in the 1980s and 1990s.

Recently, due to immigration, Valley has begun to experience a high rate of growth similar to eastern Loudoun schools like Park View and Broad Run.

As of May 2019, the reputation of Ross has seen further decline, with local parents protesting outside of the school and creating an online petition calling for her removal as the principal of Loudoun Valley.

They went on eventually to win the Nike Cross Nationals XC Meet with an all time low of 89 points.