State highway in Forest and Warren counties in Pennsylvania, United States
Pennsylvania Route 666
Route information
Maintained by PennDOT
Length
33.557 mi[1] (54.005 km)
Existed
1928–present
Major junctions
West end
US 62 in Hickory Township
East end
US 6 in Sheffield
Location
Country
United States
State
Pennsylvania
Counties
Forest, Warren
Highway system
Pennsylvania State Route System
Interstate
US
State
Scenic
Legislative
← PA 664
→ PA 669
Pennsylvania Route 666 (PA 666) is an east–west state route located in northwest Pennsylvania. The western terminus of the route is at U.S. Route 62 (US 62) in the Hickory Township municipality of East Hickory, and its eastern terminus is at US 6 in the hamlet of Sheffield. It cuts through most of Allegheny National Forest, and is therefore sparsely populated, with the largest settlement along the road being Endeavor. Its official name is the David Zeisberger Memorial Highway.
The route was assigned in the 1928 numbering of State Routes in Pennsylvania. The highway originally ended in the town of Nebraska until being extended southward along other streets. The route was realigned in 1946 onto its present routing. The highway has remained the same since.
^Bureau of Maintenance and Operations (January 2015). Roadway Management System Straight Line Diagrams (Report) (2015 ed.). Pennsylvania Department of Transportation. Retrieved June 30, 2015.
Forest County (PDF)
Warren County (PDF)
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Global Information
US 62 in Hickory Township
US 6 in Sheffield
