 Accordingly, many have moved to eastern Loudoun and become residents of planned communities such as Sterling Park, Sugarland Run, Cascades, and Ashburn Farm, making that section a veritable part of the Washington suburbs.Others have moved to the county seat or to the small towns and rural communities of the Loudoun Valley.The county's official motto, "I Byde My Time", is borrowed from the coat of arms of the Earl of Loudoun.