Muddy Run (West Branch Susquehanna River tributary)

New Columbia is a census-designated place located in White Deer Township, Union County in the state of Pennsylvania. The community is located in eastern Union County along U.S. Route 15, very near to the West Branch Susquehanna River. As of the 2010 census the population was 1,013 residents.

Warrior Run (also known as Warrior Run Creek) is a tributary of the West Branch Susquehanna River in Northumberland County, Pennsylvania, in the United States. It is 9.5 miles (15.3 km) in length. It has a watershed area of 21.6 square miles and the watershed is in Northumberland and Lycoming Counties. The main soil series in the watershed is the Berks-Weikert-Bedington series and the main land uses are agriculture and forest. The communities of Watsontown, Turbotville, and McEwensville are all in or near the watershed. The Warrior Run watershed was inhabited by Europeans in the early 1770s. Several mills and forts were built along it.

White Deer Township is a township in Union County, Pennsylvania, United States. The population was 4,331 at the 2020 census.

The Milton Historic District is a national historic district that is located in Milton, Northumberland County, Pennsylvania. It was added to the National Register of Historic Places in 1986.

Milton State Park is an 82 acres (33 ha) Pennsylvania state park in Milton in Northumberland County, Pennsylvania in the United States. The park is on Montgomery Island in the West Branch Susquehanna River, just east of the village of West Milton in Union County. Milton State Park is on Pennsylvania Route 642.

The Milton Freight Station is an historic, American freight station that is located in Milton, Northumberland County, Pennsylvania. It was built by the Philadelphia & Reading Railroad in 1883. It was added to the National Register of Historic Places in 1977.

The Pennsylvania Canal and Limestone Run Aqueduct is an historic, American aqueduct complex that is located in Milton, Northumberland County, Pennsylvania. It was added to the National Register of Historic Places in 1978.

White Deer Creek is a tributary of the West Branch Susquehanna River in Centre County and Union County, in Pennsylvania, in the United States. It is approximately 28 miles (45 km) long and flows through Miles Township in Centre County and Hartley Township, Lewis Township, West Buffalo Township, and White Deer Township in Union County. The watershed of the creek has an area of 45.1 square miles (117 km2). Parts of the creek are designated as impaired. The creek's discharge near White Deer can be as low as 3 cubic feet per second (0.085 m3/s) or as high as 169 cubic feet per second (4.8 m3/s). White Deer Creek is a freestone stream in mountainous terrain. It is relatively small and flows through a valley that is narrow, but can be up to 1,000 feet (300 m) wide. The creek flows alongside Interstate 80 for much of its length. A significant part of the land in the creek's watershed is forested, with large areas being owned by the Pennsylvania Bureau of Forestry. The watershed of the creek is designated as a High-Quality Coldwater Fishery and a Migratory Fishery. It has both brook trout and brown trout and is stocked with trout. White Deer Creek's name comes from the word Woap'-achtu-hanne, meaning "white-deer stream". The creek appeared on maps as early as 1759. A number of mills were erected adjacent to it during the eighteenth and nineteenth centuries. Major historic industries in the watershed included lumbering and agriculture. A number of bridges have been erected across the creek. Much of the length of White Deer Creek is in Bald Eagle State Forest; the creek also passes through McCalls Dam State Park. Other recreational opportunities include angling and canoeing.

Watsontown River Bridge is a historic bridge in Watsontown, Northumberland County, Pennsylvania and White Deer Township, Union County, Pennsylvania. It was built in 1927, and consists of nine open spandrel arches with a total length of 1,080-foot-long (330 m). It is constructed of concrete and crosses the Susquehanna River.It was listed on the National Register of Historic Places in 1988.

Limestone Run is a tributary of the West Branch Susquehanna River, in Montour County and Northumberland County, in Pennsylvania, in the United States. It is 8.8 miles (14.2 km) long and flows through Limestone Township in Montour County and Turbot Township and Milton in Northumberland County. The watershed has an area of 11.6 square miles (30 km2). Slightly under 2,500,000 pounds (1,100,000 kg) of sediment flow through the stream annually. The stream's watershed is in the ridge and valley physiographic province. The watershed of Limestone Run is mostly agricultural. However, other land uses in the stream's watershed include forests, developed land, wetlands, and coal mines. Several mills in Milton and Turbot Township historically drew their power from Limestone Run. The Pennsylvania Canal and Limestone Run Aqueduct also crossed the stream in Milton. Major floods of the stream include one in August 1817 and one in June 1972. The stream's watershed is designated as a Warmwater Fishery and a Migratory Fishery.

Milton Armory is a historic National Guard armory located at Milton, Northumberland County, Pennsylvania. It was designed by W.G. Wilkins Co. It was built in 1922 and expanded in 1930. It is a "T"-plan building consisting of a two-story administration building with a one-story drill hall executed in the Tudor Revival style. It is constructed of brick and sits on a concrete foundation. It features stone window and door surrounds.It was added to the National Register of Historic Places in 1991.

West Milton is a census-designated place located in Kelly and White Deer Townships in Union County in the state of Pennsylvania. The community is located directly across the West Branch Susquehanna River from the borough of Milton which is located in Northumberland County, from which West Milton derived its name. West Milton is located along U.S. Route 15, a few miles south of the community of New Columbia. Between Milton and West Milton, in the river is Montgomery Island where Milton State Park is located. As of the 2010 census the population was 900 residents.