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Mason Dixon Trail: Lock 12 Shuttle



5.1 mile 8.2 kilometer point to point
88% Runnable


Ascent: 993' 303 m
Descent: -446' -136 m
High: 714' 218 m
Low: 148' 45 m


Avg Grade: 5% (3°)
Max Grade: 25% (14°)


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Trail shared by Liz Stevens

A quiet run with views of the Susquehanna River.

Liz Stevens

Features Fall Colors · River/Creek · Spring · Views · Waterfall

Be aware this area is open to hunting.


This is an intermediate run that follows a portion of the much longer Mason Dixon Trail over rolling terrain along the Susquehanna River. The blue blazes that mark the trail are usually easy to find, but at a few spots can be hard to spot. There are steep climbs, descents, and boulder scrambles throughout the trail. Two stream crossings will need to be conquered, fortunately, a mix of rocks and logs make it easier.

The obstacles are well worth the trouble as this is a particularly nice section featuring woods, a waterfall, and several good viewpoints over the river and the dam to the north.

Need to Know

To run this as a shuttle, park the first car at the Stage Game Lands 181 Parking area off of Posey Road and then drive the second car to the Lock 12 Parking Area.


Soon after leaving the parking area, the trail passes the remnants of an old sawmill. Ahead, the singletrack crosses over the River Road to climb to a tree-lined alcove where a cheerful waterfall cascades away. This is a good spot to turn around if traveling with young runrs.

Otherwise, the singletrack follows the rolling terrain through the shaded woods until it briefly overlaps a gravel road a few miles ahead. After the road, runrs are rewarded with a bamboo tunnel that hangs low over the trail.

Look for a large clearing after the second stream crossing. This makes a great spot to relax and enjoy a snack or lunch before finishing the final gradual climb of the run.

Flora & Fauna

Many different types of plants, including a bamboo tunnel to run through.

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May 14, 2019
Trish Heiland Young

Trail Ratings

  4.2 from 6 votes


  4.2 from 6 votes
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in Pennsylvania


400 Views Last Month
3,894 Since Nov 6, 2016



A short bamboo tunnel.
Nov 6, 2016 near Airville, PA
Waterfalls near Lock 12
Apr 24, 2019 near Airville, PA
Waterfalls near Susquehanna River.
Apr 24, 2019 near Airville, PA
Waterfall around 1 mile of the trail!
Nov 6, 2016 near Airville, PA
View of the Susquehanna along the trail.
Nov 6, 2016 near Airville, PA


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