| Rocky Run | |
| Name Other: | Tributary to Brandywine Creek |
| Map Size: | 180 |
| Pushpin Map: | Delaware#USA |
| Pushpin Map Size: | 180 |
| Pushpin Map Caption: | Location of Rocky Run mouth |
| Pushpin Map Alt: | Map of Turkey Run mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Delaware |
| Subdivision Type3: | County |
| Subdivision Name3: | New Castle |
| Length: | 2.3miles[1] |
| Discharge1 Location: | Brandywine Creek |
| Discharge1 Avg: | 2.65cuft/s at mouth with Brandywine Creek[2] |
| Source1: | South Branch Naamans Creek divide |
| Source1 Location: | Devonshire, Delaware[3] |
| Source1 Coordinates: | 39.825°N -75.5336°W[4] |
| Source1 Elevation: | 380feet |
| Mouth: | Brandywine Creek |
| Mouth Location: | about 0.25 miles northwest of Tavistock, Delaware[5] |
| Mouth Coordinates: | 39.8111°N -75.5664°W |
| Mouth Elevation: | 135feet |
| Progression: | west-southwest |
| River System: | Delaware River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | Hurricane Run |
| Bridges: | Shipley Road, Tunison Drive, Rockfield Drive S, US 202 |
Rocky Run is a stream in northern New Castle County, Delaware. The stream flows for several miles through Brandywine Creek State Park and part of First State National Historical Park before feeding the larger Brandywine Creek.[6] [7] [8] Rocky Run itself is fed by Hurricane Run, also located in Brandywine Creek State Park.
Rocky Run rises in Devonshire, Delaware in Devon Park[3] and then flows west-southwest to join Brandywine Creek about 0.25 miles northwest of Tavistock.[5]
Rocky Run drains of area, receives about 47.8 in/year of precipitation, has a topographic wetness index of 477.25 and is about 31% forested.[2]