| Sandy Run | |
| Name Other: | Tributary to Occoquan River |
| Map Size: | 300 |
| Pushpin Map: | USA Virginia#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Sandy Run mouth |
| Pushpin Map Alt: | Map of Sandy Run mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Virginia |
| Subdivision Type3: | County |
| Subdivision Name3: | Fairfax |
| Length: | 2.65miles[1] |
| Discharge1 Location: | Occoquan River |
| Discharge1 Avg: | 9.01cuft/s at mouth with Occoquan River[2] |
| Source1: | Popes Head Creek divide[3] |
| Source1 Location: | Butts Corner, Virginia |
| Source1 Coordinates: | 38.7797°N -77.33°W[4] |
| Source1 Elevation: | 120feet |
| Mouth: | Occoquan River in Occoquan Reservoir |
| Mouth Location: | about 3 miles northwest of Occoquan, Virginia |
| Mouth Coordinates: | 38.7006°N -77.3064°W |
| Mouth Elevation: | 400feet |
| Progression: | generally south |
| River System: | Potomac River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
| Bridges: | Rutledge Drive (x2), Clifton Road, Henderson Road, Cathedral Forest Drive, Hampton Road |
Sandy Run is a 2.65miles long second-order tributary to the Occoquan River in Fairfax County, Virginia.
Sandy Run rises on the Pope Head Creek divide and then flows south to join the Occoquan River about 3 miles northwest of Occoquan, Virginia.[3]
Sandy Run drains of area, receives about 43.5 in/year of precipitation, and is about 69.29% forested.[2]