Mason-Dixon Line Monument – Big Savage Tunnel loop from Rockwood

Bike touring routes & trails

United States

Pennsylvania

Somerset County

Mason-Dixon Line Monument – Big Savage Tunnel loop from Rockwood

Hard

3.1

(7)

riders

Mason-Dixon Line Monument – Big Savage Tunnel loop from Rockwood

10:53

141km

1,330m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. The starting point of the route is right next to a parking lot.

Last updated: October 28, 2026

Waypoints

Start point

Parking

Get Directions

1.06 km

Great Allegheny Passage (GAP)

Highlight (Segment) • Cycleway

The Great Allegheny Passage, or GAP, was once a rail line. Now it's a 150-mile multi-use trail that winds through Maryland and Pennsylvania, with this section traveling alongside the Casselman River. The trail surface is mostly crushed stone dust with occasional stretches of pavement, so it's easily ridden on a touring bike.

Tip by

16.8 km

Salisbury Viaduct

Highlight • Bridge

The Salisbury Viaduct is one of several engineering masterpieces along the GAP. The steel bridge was constructed in 1911 and for years took trains across the Casselman River. Now, it gives GAP users an amazing 360 degree view of the forest below and is a popular place to watch the sunrise or sunset.

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32.6 km

Eastern Continental Divide

Highlight • Monument

Congratulations! You've reached the highest point in the Great Allegheny Passage, which runs from Pittsburgh, Pennsylvania to Cumberland, Maryland.

The Eastern Continental Divide marks a stark divide between two watersheds: To your east, the waterways drain (eventually) into the Atlantic Ocean. The waters to your west funnel toward the Gulf of Mexico.

Tip by

35.8 km

Viewpoint

45.9 km

Frostburg Trailhead

Highlight • Trail

The GAP does not pass through the center of Frostburg, but that does not stop the town from being a popular stop for cyclists on the trail. It's a short ride from the trail head into the historic town, which started as a stagecoach stop and was a major coal mining hub. Now, the town is full of restaurants, culture, and accommodation.

At the trailhead, there are restrooms and water available, as well as parking.

Tip by

64.5 km

Cumberland Bone Cave

Cave Entrance

70.8 km

Great Allegheny Passage KM 0 and C&O Canal Towpath Northern Terminus

Highlight • Trail

The official Mile 0 of the Great Allegheny Passage is found in downtown Cumberland under the arch, next to the train station and connected to the northern terminus of the C&O Canal and Towpath. The town is well-connected, with Amtrak service that accepts bikes and ample parking.

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104 km

Mason-Dixon Line Monument

Highlight • Monument

The Mason-Dixon Line Monument marks the historic boundary between the states of Maryland and Pennsylvania. Today, it is a scenic rest stop for hikers, featuring a granite obelisk, engraved blocks spelling "Mason & Dixon," and a replica of the surveyors' 66-foot chain. It is a great photo opportunity and Easily a must-see for history buffs.

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106 km

Big Savage Tunnel

Highlight (Segment) • Structure

The Big Savage Tunnel is one of the highlights of the GAP. The 3,291-foot tunnel was refurbished for bike use in 2003 and has a modern lighting system. On the eastern end of the tunnel there is a great viewpoint and picnic tables.

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122 km

Meyersdale Visitors Center

Highlight • Rest Area

Nice place to stop for lunch or a break. Visitor's center includes a small museum on the history of Meyersdale and the region, a gift shop, bathrooms, water, and a room with model trains. They can answer information on the GAP and local places to eat or sleep.

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