| Smith Cabin Run | |
| Source1 Location: | unnamed pond in western Colley Township, Sullivan County, Pennsylvania |
| Mouth Coordinates: | 41.5267°N -76.2836°W |
| Length: | 1.6miles |
| Source1 Elevation: | 2192feet |
| Mouth Elevation: | 1460feet |
| Basin Size: | 1.45sqmi |
| Tributaries Right: | two unnamed tributaries |
Smith Cabin Run is a tributary of North Branch Mehoopany Creek in Sullivan County, Pennsylvania, in the United States. It is approximately 1.6miles long and flows through Colley Township. The watershed of the stream has an area of 1.45sqmi. The stream has a high gradient and flows primarily through forested land. It has an unnamed pond at its headwaters and a 20feet waterfall on an unnamed tributary.
Smith Cabin Run begins in an unnamed pond near the road T409 in western Colley Township, close to the Colley Township/Cherry Township line. It flows northeast for a short distance and enters a valley, where it flows east for a few tenths of a mile and then east-southeast. After several tenths of a mile, the stream's valley broadens and it receives two unnamed tributaries from the . It then reaches the bottom of its valley and turns northeast, reaching its confluence with North Branch Mehoopany Creek.
Smith Cabin Run joins North Branch Mehoopany Creek 10.28miles upstream of its mouth.
Smith Cabin Run is not designated as an impaired waterbody. In an August 2001 study, the stream was found to be dry except in a single pool. When the ambient air temperature was 21C, the water temperature was measured to be 16.7C.
In the August 2001 study, the pH of Smith Cabin Run 0.62miles upstream of its mouth was 7.0 and the alkalinity was 29mg/L. The water hardness was 41mg/L and the specific conductance was 81 umhos.
The elevation near the mouth of Smith Cabin Run is 1460feet above sea level. The elevation near the stream's source is 2192feet above sea level.
Smith Cabin Run is a high-gradient stream, falling at a rate of 89.2m/km. It flows in a generally easterly direction.
There is a waterfall on an unnamed tributary of Smith Cabin Run, approximately 600feet from the nearest road. The waterfall is approximately 20feet high and does not have a significant amount of flow except after heavy rain. The watershed also includes an unnamed pond and parts of Briskey Mountain.
The watershed of Smith Cabin Run has an area of 1.45sqmi. The stream is entirely within the United States Geological Survey quadrangle of Colley. It joins North Branch Mehoopany Creek at Colley.
The watershed of Smith Cabin Run is primarily in forested regions. A total of 69 percent of the stream's length is within 100m (300feet) of a road and all of it is within 300m (1,000feet) of one. In 2000, the population density of the watershed was 4/km2.
Wild trout naturally reproduce in the watershed of Smith Cabin Run from its headwaters downstream to its mouth. The stream is classified as a Coldwater Fishery.
Smith Cabin Run was entered into the Geographic Names Information System on August 2, 1979. Its identifier in the Geographic Names Information System is 1187856.
Pennsylvania Fish and Boat Commission biologists visited Smith Cabin Run in August 2001 and found that there were no fish habitats there. However, in May 2014, the Pennsylvania Fish and Boat Commission held a meeting to determine whether to add Smith Cabin Run, among other streams, to their list of wild trout streams.
A portion of Pennsylvania State Game Lands Number 66 is in the watershed of Smith Cabin Run.