| Marsh Run | |
| Source1 Location: | small pond in western Fairmount Township, Luzerne County, Pennsylvania |
| Mouth Location: | Coles Creek in northeastern Sugarloaf Township, Columbia County, Pennsylvania |
| Mouth Coordinates: | 41.2842°N -76.3224°W |
| Progression: | Coles Creek → Fishing Creek → Susquehanna River → Chesapeake Bay |
| Length: | 1miles |
| Source1 Elevation: | between 1220feetand1240feetft (andft) |
| Mouth Elevation: | 1115feet |
| Basin Size: | 0.44sqmi |
| Tributaries Right: | one unnamed tributary |
Marsh Run is a tributary of Coles Creek in Luzerne County and Columbia County, in Pennsylvania, in the United States. It is approximately 1miles long and flows through Fairmount Township in Luzerne County and Sugarloaf Township in Columbia County. The stream's watershed has an area of 0.44sqmi. Wild trout reproduce throughout the stream. It is named after marshes, which can be found in the vicinity of the stream. Alluvium and Wisconsinian Outwash area also present, as is bedrock consisting of sandstone and shale. The stream has one unnamed tributary.
Marsh Run begins in a small pond in western Fairmount Township, Luzerne County. It flows west for several tenths of a mile, passing through a wetland and crossing Hynick Road. Almost immediately after crossing Hynick Road, the stream exits Luzerne County. Upon exiting Luzerne County, it enters Sugarloaf Township, Columbia County. The stream continues flowing west, receiving an unnamed tributary from the right after a short distance. A short distance further downstream, it reaches its confluence with Coles Creek.
Marsh Run joins Coles Creek 4.48miles upstream of its mouth.
The elevation near the mouth of Marsh Run is 1115feet above sea level. The elevation of the stream's source is between 1220feetand1240feetft (andft) above sea level. The stream is relatively small and has marshes along it.
For most of its length, Marsh Run flows over a glacial till known as the Wisconsinian Till. Most of the till in the vicinity of the stream is expected to be more than 6feet thick. However, the stream's lower reaches are on alluvium and Wisconsinan Outwash. The former contains stratified sand, silt, and gravel, while the latter contains stratified sand and gravel. Bedrock consisting of sandstone and shale is also present in the vicinity of the stream. A wetland is located in its upper reaches.
The watershed of Marsh Run has an area of 0.44sqmi. The stream is entirely in the United States Geological Survey quadrangle of Red Rock. It is located in the northeastern portion of Sugarloaf Township.
Wild trout naturally reproduce in Marsh Run throughout between its headwaters and its mouth.
Marsh Run was entered into the Geographic Names Information System on August 2, 1979. Its identifier in the Geographic Names Information System is 1180455.
Marsh Run is named for the fact that marshes are located along it.