A 32.6 mile route, PA 851 traverses hills and farm land across southern York County from PA 516 at Sticks to PA 74 near Delta. The state route ended at Railroad from the west originally, but was extended over PA 516 to Sticks when PA 516 shifted southwest to Lineboro.
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| PA 851 turns from South Main Street onto East Main Street at the south end of PA 616 within the borough of Railroad. 06/05/05 |
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| Just east of PA 616 (North Main Street) is the PA 851 crossing of the Heritage Rail Trail. The linear county park stretches 21 miles from the Maryland state line to York. 06/05/05 |
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| PA 851 exits Railroad for Shrewsbury Township before entering the borough of Shrewsbury. 06/05/05 |
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| PA 851 follows a dog leg route into Shrewsberry from Railroad Avenue onto Park Avenue north and Forrest Avenue east. 06/05/05 |
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| Forrest Avenue heads east from Glen Valley Road by a few subdivisions before becoming a part of PA 851 through the heart of Shrewsbury. 06/05/05 |
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| Passing under a set of fire signals at the intersection of PA 851 (Forrest Avenue) and Sunset Drive. 06/05/05 |
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| Historic U.S. 111 followed Main Street through Shrewsberry. The former US highway serves local interests south to a number of suburbs ahead of the Maryland line and north to Hametown.
PA 851 Truck follows the roadway south to Constitution Avenue and New Freedom. 06/05/05 |
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| A reassurance shield for PA 851 follows Main Street (old U.S. 111) at Highland Drive. 06/05/05 |
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| Mt. Airy Road crosses PA 851 (Forrest Avenue) at the third traffic light in Shrewsbury. The road locally serves a number of adjacent retail centers as well as suburban areas along the western frontage of Interstate 83. 06/05/05 |
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| PA 851 advances east from Mt. Airy Road to Interstate 83. Constructed from February 2019 to Spring 2021 reconfigured the forthcoming exchange into a DDI. 06/05/05 |
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| Downtown Baltimore is 41 miles away via I-83 south, close enough that Shrewsbury doubles as a bedroom community for Maryland's largest city. 06/05/05 |
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| Interstate 83 leads south four miles to Maryland Line and 21 miles to Cockeysville. The freeway is somewhat rural through this stretch, but traffic counts reflect the connectivity between Harrisburg and Baltimore with 39,000 vehicles per day recorded at Shrewsbury in 2011. 06/05/05 |
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| Interstate 83 comprises a four lane freeway with a barrier median through southern York County. The narrow freeway reflects the age of I-83, which opened as a realignment for U.S. 111 in the 1950s. 06/05/05 |
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| A rare state named shield that was still in service for Interstate 83 on PA 851 east. 06/05/05 |
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| Interstate 83 continues north from Shrewsbury and PA 851, 14 miles to York and 40 miles to Harrisburg. 06/05/05 |
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| Rural scenery returns to PA 851 (Forrest Avenue) as the route leaves Interstate 83 and nearby Elm Drive. 06/05/05 |
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| PA 851 crosses Deer Creek just east of the intersection with Windy Hill Drive before climbing onto a hill east of Tolna. 06/05/05 |
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| Dropping into a small valley west of Orwig along PA 851 (Bridgeview Road) between Orwig and Sawmill Roads. 06/05/05 |
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| Stewartstown, a borough of over 2,000, lies along PA 851 east at PA 24. The state route follows Hill Street to Pennsylvania Avenue east to the borough center. 06/05/05 |
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| Pennsylvania Avenue carries a short stretch of PA 851 between Hill Street and PA 24 (Main Street). PA 851 joins PA 24 south for just a tenth of a mile to College Avenue. 06/05/05 |
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| Approaching the intersection with PA 24 (Main Street) on Pennsylvania Avenue east. PA 24 constitutes a 28.3 mile route from PA 921 at Mount Wolf to the Maryland state line at Wiley. 06/05/05 |
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| PA 24 leads southeast 3.7 miles from Pennsylvania Avenue to become MD 23 ahead of Norrisville. MD 24 is located six miles east of there from Fawn Grove south to Bel Air. PA 24 and MD 23 are not connected however. 06/05/05 |
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| Pennsylvania Avenue becomes Hollow Road east of PA 24 and PA 851 to serve a number of subdivisions in northeast Stewartstown. PA 851 stays south of those areas along College Avenue to Pleasant Valley Road. 06/05/05 |
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| A PA 24 marker stands south of the merge with PA 851 between Pennsylvania Avenue and College Avenue. 06/05/05 |
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| PA 851 quickly turns east from PA 24 south for New Park and Fawn Grove. 06/05/05 |
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| PA 851 (Forrest Avenue) meets Interstate 83 just outside the borough of Shrewsbury at Exit 4. 10/01/05 |
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| Former state named shield for the northbound I-83 entrance ramp to York. Construction from February 2019 to Spring 2021 reconfigured the exchange joining PA 851 with I-83 into a DDI. 10/01/05 |
Page Updated 01-12-2021.
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