| Mile Run | |
| Source1 Location: | valley between Fawn Ridge and Pine Flat in West Buffalo Township, Union County, Pennsylvania |
| Mouth Location: | White Deer Creek in West Buffalo Township, Union County, Pennsylvania near White Deer |
| Mouth Coordinates: | 41.0632°N -77.0662°W |
| Progression: | White Deer Creek → West Branch Susquehanna River → Susquehanna River → Chesapeake Bay |
| Length: | 1.9miles |
| Source1 Elevation: | 1546feet |
| Mouth Elevation: | 997feet |
| Discharge1 Avg: | 2.58cuft/s |
| Basin Size: | 1.57sqmi |
| Tributaries Left: | two unnamed tributaries |
Mile Run is a tributary of White Deer Creek in Union County, Pennsylvania, in the United States. It is approximately 1.9miles long and flows through West Buffalo Township. The watershed of the stream has an area of 1.57sqmi. It has been described as a "spring run". Wild trout naturally reproduce within the stream and numerous bryophyte species have been observed in its vicinity.
Mile Run begins in a valley between Fawn Ridge and Pine Flat in West Buffalo Township. It flows east-northeast through the valley for several tenths of a mile before receiving an unnamed tributary from the left. It then gradually turns south, receiving another unnamed tributary from the left. At this point, the stream turns south for several tenths of a mile, passing between Pine Flat and Little Mountain. It then reaches the end of its valley and crosses Interstate 80 before turning east-southeast. A short distance further downstream, the stream reaches its confluence with White Deer Creek.
Mile Run joins White Deer Creek 11.82miles upstream of its mouth.
The elevation near the mouth of Mile Run is 997feet above sea level. The elevation of the stream's source is 1546feet above sea level.
Mile Run has been described as a "spring run".
The watershed of Mile Run has an area of 1.57sqmi. The stream is entirely within the United States Geological Survey quadrangle of Williamsport SE. Its mouth is situated near White Deer.
A total of 1.25sqmi of the watershed of Mile Run is in Union County.
The average daily discharge of Mile Run is 2.58cuft/s.
Mile Run was entered into the Geographic Names Information System on August 2, 1979. Its identifier in the Geographic Names Information System is 1181098.
The White Deer Valley Railroad, which was incorporated on December 11, 1900, passed in the vicinity of Lick Run. It was built in 1901 and was owned by John Duncan as a logging railroad. However, it was sold to the White Deer Lumber Company and became the White Deer and Loganton Railroad on April 17, 1906.
Wild trout naturally reproduce in Mile Run for a total of 1.24miles of its length. The trout species in the stream is brook trout.
A variety of bryophyte species were observed in the vicinity of Mile Run on July 29, 1995. Approximately 20 species were observed, including Hygroamblystegium tenax, Hypnum pallescens, Platyhypnidium riparioides, Platylomella lescurii, Hypnum lindbergii, and numerous others.