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Routes
Bike touring routes & trails
United States
Maryland
Baltimore County
Catonsville

Patapsco Traverse and Grist Mill Trail Loop

Moderate

2.7

(22)

30

riders

Patapsco Traverse and Grist Mill Trail Loop

01:34

20.0km

260m

Cycling

The Patapsco Traverse and Grist Mill Trail Loop offers a diverse touring cycling experience, blending smooth, paved sections with more rugged unpaved paths and even some singletrack. This moderate 12.4 miles (20.0 km) route takes you along the Patapsco River, through dense woodlands, and past the iconic Patapsco Swinging Bridge,…

Last updated: June 9, 2026

Tips

Cycling is not permitted along parts of this route

After 127 m for 218 m

After 12.4 km for 52 m

After 19.7 km for 218 m

Waypoints

A

Start point

Parking

Get Directions

1

14.2 km

Swinging Bridge and Patapsco Riverbank

Highlight • Bridge

The Patapsco River flows through central Maryland and into the Chesapeake Bay.

The river is known as the River of History as it played an essential role in Maryland's Industrial …

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B

20.0 km

End point

Parking

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Way Types & Surfaces

Way Types

10.7 km

3.54 km

2.63 km

2.03 km

832 m

285 m

Surfaces

9.00 km

6.38 km

4.29 km

376 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (130 m)

Lowest point (10 m)

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Weather

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Today

Monday 6 July

30°C

22°C

83 %

Additional weather tips

Max wind speed: 12.0 km/h

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Frequently Asked Questions

What is the estimated cycling time for the Patapsco Traverse and Grist Mill Trail Loop?

This touring bicycle route is approximately 20 km (12.4 miles) long and typically takes around 1 hour and 34 minutes to complete. This duration can vary based on your cycling pace and how often you stop to enjoy the scenery or historical sites.

What is the terrain like for touring cycling on this route?

The route combines the well-defined, paved Grist Mill Trail with other suitable paths within Patapsco Valley State Park. The Grist Mill Trail section is largely flat, paved, and considered easy, ideal for touring bikes. However, the 'Patapsco Traverse' portions might involve connecting paved roads or smoother multi-use paths, and you should be prepared for varied surfaces, potentially including some unpaved sections depending on the exact connectors chosen.

Is this cycling route suitable for beginners or families?

The Grist Mill Trail portion is very beginner and family-friendly, being paved and largely flat. The overall 'moderate' difficulty of the loop suggests that some sections of the 'traverse' might require a bit more experience or fitness, especially if they involve unpaved connectors. It's best to review the specific route details if you are bringing young children or are new to cycling.

What historical sites or landmarks can I see along the way?

The route offers a rich historical experience, particularly along the Grist Mill Trail. You can expect to see remnants of old mills, the site of the former Bloede's Dam, and the scenic Swinging Bridge and Patapsco Riverbank. The active railroad line running parallel to the trail also adds an interesting element.

What is the best time of year to cycle this loop?

The trail offers scenic beauty year-round. Spring and fall provide comfortable temperatures and vibrant foliage. Late fall and winter can offer clearer views of the forested hillsides and river crossings, including potential views of Liberty Dam Overlook in the McKeldin area. Always check local weather conditions before heading out.

Where can I park to access the Patapsco Traverse and Grist Mill Trail Loop?

Access points for the Grist Mill Trail, which forms a significant part of this loop, are typically found within Patapsco Valley State Park. Common parking areas include those near the Avalon Area or Orange Grove Area. Check the official Maryland State Parks website for specific parking lot locations and any associated fees.

Are there any permits or fees required to access Patapsco Valley State Park?

Yes, Patapsco Valley State Park generally charges an entrance fee per vehicle, especially during peak seasons or weekends. It's advisable to check the official Maryland Department of Natural Resources website (maryland.gov) for the most current information on entrance fees, operating hours, and any specific permits that might be required for certain activities or areas within the park.

Is this cycling route dog-friendly?

Dogs are generally permitted in Patapsco Valley State Park, including on trails like the Grist Mill Trail, but they must be kept on a leash at all times. Please ensure you clean up after your pet to help keep the park enjoyable for everyone.

Does this route connect with other trails in Patapsco Valley State Park?

Yes, this route utilizes and connects various paths within the park. You will cycle sections of the Patapsco Traverse (north hiking), Patapsco Traverse (north mtb), Patapsco Alt HoCo Thru Trail, Santee Branch Trail, and of course, the Grist Mill Trail. It also touches upon parts of the Patapsco Traverse (south hiking) and Patapsco Traverse (south mtb).

Are there places to eat or stay near the trail?

While there are no direct facilities on the Grist Mill Trail itself, the surrounding areas of Patapsco Valley State Park, such as Ellicott City or Catonsville, offer various dining options, cafes, and accommodation choices. It's a good idea to plan your refreshments and lodging before or after your ride.

What makes the Grist Mill Trail section particularly notable for cyclists?

The Grist Mill Trail is a standout because it's one of the few paved, multi-use trails within Patapsco Valley State Park, making it exceptionally accessible for touring cyclists, families, and casual riders. It offers a smooth ride through continuous natural scenery along the Patapsco River, combined with a journey through the valley's rich industrial history.

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