Major Watersheds in Loudoun County

Watershed Name Drainage Area
(square miles)
Drainage Area in
Loudoun County
(square miles)
Drains to Which Watershed
Beaverdam Creek 53.3
53.5 North Fork Goose Creek
Broad Run 77.6 67.5 Potomac River
Bull Run 93.2 14.6 Occoquan Reservoir
Catoctin Creek 92.4
92.4 Potomac River
Clarks Run 6.9 6.9 Potomac River
Cub Run 52.8 14.0 Lower Bull Run
Direct to Potomac 37.0 37.0 Potomac River
Dutchman Creek 12.9 12.9 Potomac River
Limestone Branch 16.1 16.1 Potomac River
Lower Goose Creek 119.8 89.2 Potomac River
North Fork Catoctin Creek 44.4 44.4 Catoctin Creek
North Fork Goose Creek 44.4 44.4 Lower Goose Creek
Piney Run 14.8 14.8 Potomac River
Quarter Branch 2.9 2.9 Potomac River
South Fork Catoctin Creek 33.0 33.0 Catoctin Creek
Sugarland Run 19.8 6.0 Potomac River
Upper Goose Creek 168.5   Lower Goose Creek