Asylum Run is a 4.2 miles (6.8 km) tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of Paxton Creek

Paxton Creek

Paxton Creek is a tributary of the Susquehanna River in Dauphin County, Pennsylvania in the United States.The Paxton Creek watershed covers an area of and joins the Susquehanna River at Harrisburg....

 in Dauphin County

Dauphin County, Pennsylvania

Dauphin County is a county in the U.S. state of Pennsylvania and is one of the three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010 census, the population was 268,100. The county includes the city of Harrisburg, which has served as the state capital...

, Pennsylvania

Pennsylvania

The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

 in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.

Asylum Run joins Paxton Creek at the north-easternmost border of Harrisburg

Harrisburg, Pennsylvania

Harrisburg is the capital of Pennsylvania. As of the 2010 census, the city had a population of 49,528, making it the ninth largest city in Pennsylvania...

 at the Pennsylvania Farm Show

Pennsylvania Farm Show

The Pennsylvania Farm Show is held every January at the Pennsylvania Farm Show Complex & Expo Center located in Harrisburg, Pennsylvania, just off Exit 67 of Interstate 81. The event, considered Pennsylvania's state fair, first began in 1917. It is the largest indoor agricultural event held in the...

 Complex.

It is a tributary with flashy flows. This means the water levels can vary greatly with storm events, due to rapid runoff upstream from massive amounts of impervious surfaces in Colonial Park

Colonial Park, Pennsylvania

Colonial Park is a census-designated place in Lower Paxton Township, Dauphin County, Pennsylvania, United States. The population was 13,259 at the 2000 census. It is part of the Harrisburg–Carlisle Metropolitan Statistical Area. It uses the Harrisburg zip code of 17109 and hosts a great deal...

, Penbrook

Penbrook, Pennsylvania

Penbrook is a borough in Dauphin County, Pennsylvania, founded in 1861 and incorporated July 10, 1894. Penbrook was once named East Harrisburg and still maintains a Harrisburg postal ZIP code...

, and adjacent areas.