Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Login or Signup

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

Patapsco Valley Traverse and Grist Mill Trail Loop

Moderate

3.1

(5)

87

riders

Patapsco Valley Traverse and Grist Mill Trail Loop

02:20

37.5km

370m

Cycling

Cycle the moderate 23.3-mile Patapsco Valley Traverse and Grist Mill Trail Loop, exploring historical sites and river views in Patapsco Vall

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Patapsco Valley State Park

Waypoints

A

Start point

Parking

Get Directions

1

7.95 km

Lost Lake

Highlight • Lake

Lost Lake is a small lake just north of the Patapsco River within Patapsco Valley State Park's Glen Artney Area. The lake often has various species of birds and vegetation to look at while you ride.

Tip by

2

12.6 km

Deep Run of the Patapsco Valley State Park is an 11.9-mile-long tributary of the Patapsco River. Historically, the banks of Deep Run served as a frequent hiding place for slaves …

Tip by

B

37.5 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

26.8 km

4.13 km

3.46 km

1.92 km

1.28 km

< 100 m

Surfaces

29.7 km

6.96 km

848 m

114 m

Sign up to see more specific route details

Sign up for free

Elevation

Elevation

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

Highest point (150 m)

Lowest point (10 m)

Sign up to see more specific route details

Sign up for free

Weather

Powered by Foreca

Today

Saturday 23 May

12°C

8°C

99 %

Additional weather tips

Max wind speed: 23.0 km/h

to get more detailed weather forecasts along your route

This route was planned by komoot.

Save

Edit route

Download GPX

Move start point

Print

Share

Embed on a website

Report an Issue

Frequently Asked Questions

What is the difficulty level of the Patapsco Valley Traverse and Grist Mill Trail Loop for touring cyclists?

This route is generally considered moderate for touring cyclists. While the core Grist Mill Trail section is paved and largely flat, making it easy and accessible, the full 'Patapsco Valley Traverse and Grist Mill Trail Loop' as a longer route might incorporate varied terrain or local roads that increase the overall difficulty. It's suitable for cyclists with some experience looking for a longer ride.

Is the Patapsco Valley Traverse and Grist Mill Trail Loop a true loop, or is it an out-and-back route?

The Grist Mill Trail itself is typically enjoyed as an out-and-back route, offering a paved and scenic ride along the Patapsco River. The 'Patapsco Valley Traverse and Grist Mill Trail Loop' as described for touring bicycles combines this with other suitable paths or local roads to create a longer loop. Be aware that many other trails in the broader Patapsco Valley State Park are unpaved and rugged, not ideal for touring bikes.

What kind of terrain can I expect on this cycling route?

The primary Grist Mill Trail section is predominantly paved and smooth, making it ideal for touring bicycles and those with narrower tires. It is largely flat, offering an accessible experience. If the full loop incorporates other sections, you might encounter well-maintained mixed-use paths or local roads, but the Grist Mill Trail itself is a comfortable paved ride.

What historical landmarks and scenic views will I see along the way?

The route follows the Patapsco River, offering picturesque views of the water and surrounding forest. You'll pass historical sites like old flour mill ruins, the former Bloede's Dam, and the notable Thomas Viaduct. The trail also parallels active train tracks, providing glimpses of passing trains. You'll also ride near Lost Lake and through the Patapsco Valley State Park Deep Run Area.

When is the best time of year to cycle the Patapsco Valley Traverse and Grist Mill Trail Loop?

Spring and fall offer the most pleasant cycling conditions with mild temperatures and beautiful foliage. Summer can be enjoyable, but be prepared for heat and humidity. Winter cycling is possible, but check trail conditions for ice or snow, especially after precipitation. The paved nature of the Grist Mill Trail makes it accessible year-round, weather permitting.

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

There are several parking areas within Patapsco Valley State Park that provide access to the Grist Mill Trail. Popular access points include the Avalon Area and the Orange Grove Area. Specific parking availability can vary, so it's advisable to check the official park website for the most current information and directions.

Are dogs allowed on the Patapsco Valley Traverse and Grist Mill Trail Loop?

Yes, dogs are generally allowed on trails within Patapsco Valley State Park, including the Grist Mill Trail. They must be kept on a leash no longer than six feet at all times. Please remember to clean up after your pet to help keep the park enjoyable for everyone.

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

Yes, Patapsco Valley State Park typically charges an entrance fee per vehicle, especially on weekends and holidays, or during peak season. Fees can vary by season and day of the week. You can find the most up-to-date information on fees and any permit requirements on the official Maryland Department of Natural Resources website at maryland.gov.

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

Yes, the route utilizes and intersects with several other trails within the park. You'll find sections of the Patapsco Traverse (south hiking), Patapsco Traverse (south mtb), Patapsco Alt HoCo Thru Trail, Patapsco Traverse (north hiking), and Patapsco Traverse (north mtb). Other smaller trails like Gray's Mill Trail and Vineyard Spring Trail also intersect or run nearby.

Is the Patapsco Valley Traverse and Grist Mill Trail Loop suitable for families with children?

The paved and relatively flat sections of the Grist Mill Trail are very family-friendly and suitable for children learning to cycle or riding with parents. The full 'Patapsco Valley Traverse and Grist Mill Trail Loop' may include longer distances or sections that require more endurance, so consider your family's cycling ability for the entire route. The Grist Mill Trail itself is an excellent choice for a relaxed family outing.

Are there any facilities like restrooms or water available along the route?

Restrooms and water fountains are typically available at various access points and visitor centers within Patapsco Valley State Park, such as the Avalon and Orange Grove areas. However, availability can be seasonal, so it's always a good idea to carry your own water, especially for longer rides.

Nearby routes

Moderate

5.0

95

Torrey C. Brown Rail Trail

02:48h

41.9km

410m

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

© komoot GmbH

Privacy Policy