PA 46 in Emporium
PA 155 near Emporium
PA 555 in Driftwood
PA 872 near Jericho

PA 144 in RenovoEast end Future I-99 / US 220 near Lock Haven LocationCountryUnited StatesStatePennsylvaniaCountiesElk, Cameron, Clinton Highway system

• Pennsylvania State Route System

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← US 119

→ PA 121

Pennsylvania Route 120 (PA 120) is a state highway located in north-central Pennsylvania in the United States. It stretches from U.S. Route 219 (US 219) in Ridgway east to US 220 near Lock Haven.

In much of Cameron and Clinton counties, PA 120 is a Pennsylvania Scenic Byway designated the Bucktail State Park Natural Area. Bucktail State Park Natural Area runs 75 miles (121 km) from Emporium to Lock Haven, and is named for the Pennsylvania Bucktails Regiment, who came from the area during the American Civil War. PA 120 and the park run along Sinnemahoning Creek and the West Branch Susquehanna River and also pass through Renovo (in Clinton County).

Bucktail State Park Natural Area was established by the Pennsylvania State Legislature in 1933. It includes 21,039 acres (85.14 km), of which 9,239 acres (37.39 km) are in Cameron County and 11,800 acres (47.75 km) in Clinton County. While much of the land is state owned and part of the Elk and Sproul State Forests, there are also many tracts of privately owned land within the official boundaries of the park.

The law establishing the park defined its boundaries as "all that area of land extending in length from the western city line of Lock Haven, in Clinton County, to the eastern borough line of Emporium, in the Cameron County, and along the course of the western branch of the Susquehanna River, and its tributary, Sinnemahoning Creek, in Clinton and Cameron counties, an estimated distance of 75 miles, and in width from mountain rim to mountain rim across the valley." The park is primarily dedicated to wildlife viewing, especially elk.

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PA 120 follows an old Native American Trail, the Sinnemahoning Path. This trail was used by Native Americans to cross the eastern continental divide (specifically the Allegheny Front) between the Susquehanna River (which drains into the Chesapeake Bay) and the Allegheny River (which forms the Ohio River with the Monongahela River at Pittsburgh and eventually drains into the Gulf of Mexico via the Mississippi River). American Pioneers also used the trail to make their way west and it was also known as the Bucktail Trail.

U.S. Route 120
Location	Ridgway – Lock Haven
Existed	1926–1967

PA 120 was U.S. Route 120 until ca. 1967. US 120 was initially planned in 1926 as an Erie–Philadelphia route, but was truncated to Ridgway–Reading in 1927, the route west of Ridgway primarily becoming an extension of US 6 and that to the east of Reading becoming the eastern segment of US 422. The portion east of Lock Haven of the remainder of the route became US 220, US 15, and US 122 ca. 1935; this alignment is now roughly followed by US 220, I-180, PA 147, and PA 61.

County	Location	mi	km	Destinations	Notes
Elk	Ridgway	0.000	0.000	US 219 / PA 948 (Main Street) – Kersey, Brockway, Bradford, Warren	Western terminus
		0.235	0.378	US 219 Truck north (Osterhaut Street)	Western end of US 219 Truck northbound concurrency
	Ridgway Township	1.183	1.904	US 219 Truck	Eastern end of US 219 Truck northbound concurrency; US 219 Truck northbound one-way only
	St. Marys	10.163	16.356	PA 255 south (South St. Marys Street) – DuBois	Western end of PA 255 concurrency
		10.363	16.678	PA 255 north (North Michael Street) – Johnsonburg	Eastern end of PA 255 concurrency
Cameron	Emporium	29.142	46.900	PA 46 north (Woodland Avenue) – Smethport	Southern terminus of PA 46
	Shippen Township	30.550	49.165	PA 155 north (Sizerville Road) – Port Allegany	Southern terminus of PA 155
	Driftwood	47.597	76.600	PA 555 west (Chestnut Street) – Weedville	Eastern terminus of PA 555
	Grove Township	51.355	82.648	PA 872 north (First Fork Road) – Austin	Southern terminus of PA 872
Clinton	Renovo	73.945	119.003	PA 144 north (Tamarack Road) – Galeton	Western end of PA 144 concurrency
		75.503	121.510	PA 144 south (Birch Street) – Moshannon	Eastern end of PA 144 concurrency
	Lock Haven	103.073	165.880	PA 664 north (North Jay Street) / East Water Street – Swissdale	Southern terminus of PA 664
		103.148	166.001	PA 150 south (East Main Street) – Lock Haven University	One-way pair on PA 150
		103.224	166.123	PA 150 north (East Church Street)	One-way pair on PA 150
		103.509– 103.575	166.582– 166.688	Walnut Street	Interchange; no access to westbound PA 120
	Castanea Township	103.759– 103.886	166.984– 167.188	US 220 (Appalachian Thruway) to I-80 / Jarrett Avenue – Milesburg, Williamsport	US 220 exit 111; eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

• U.S. Roads portal
• Pennsylvania portal

• 
  PA 120 westbound at PA 872 in Grove Township
• 
  US 120 in the "final" 1926 plan; it was truncated to Ridgway-Reading in 1927

• Pennsylvania Highways: PA 120
• Pennsylvania Highways: History of U.S. Route 120
• Endpoints of historic U.S. Highway 120 at USEnds.com