Highways in Pennsylvania with PA 120 in red.
|Maintained by PennDOT|
|Length||103.886 mi (167.188 km)|
|Existed||1926 (as US 120)–present|
|Bucktail Trail Scenic Byway|
|West end||US 219 / PA 948 in Ridgway|
| PA 255 in St. Marys|
PA 144 in Renovo
|East end||Future I‑99 / US 220 near Lock Haven|
|Counties||Elk, Cameron, Clinton|
Bucktail State Park Natural Area
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 km2), of which 9,239 acres (37.39 km2) are in Cameron County and 11,800 acres (47.75 km2) 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 County of Cameron, 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.
|Location||Ridgway – Lock Haven|
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.
|Elk||Ridgway||0.000||0.000||US 219 / PA 948 (Main Street) – Kersey, Brockway, Bradford, Warren||Western terminus|
US 219 Truck north (Osterhaut Street)
|Western end of US 219 Truck northbound concurrency|
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|
|Walnut Street||Interchange; no access to westbound PA 120|
|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|
- Bureau of Maintenance and Operations (January 2015). Roadway Management System Straight Line Diagrams (Report) (2015 ed.). Pennsylvania Department of Transportation. Archived from the original on February 17, 2011. Retrieved June 30, 2015.
- Google (July 24, 2014). "Pennsylvania Route 120" (Map). Google Maps. Google. Retrieved July 24, 2014.
- "Bucktail Trail". VisitPA.com. Retrieved March 27, 2012.
- "Bucktail State Park". Pennsylvania Department of Conservation and Natural Resources. Retrieved 2007-08-07.
- Weingroff, Richard F. "U.S. 6: The Grand Army of the Republic Highway". Federal Highway Administration. Retrieved 2013-01-20.
- Weingroff, Richard F. "U.S. 22: The William Penn Highway". Federal Highway Administration. Retrieved 2013-01-20.
|Wikimedia Commons has media related to Pennsylvania Route 120.|