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Routes
Hiking trails & Routes
United States
Maryland
Howard County

Patapsco Howard County Thru Trail

Moderate

4.7

(7973)

19,829

hikers

Patapsco Howard County Thru Trail

03:02

11.4km

110m

Hiking

Hike the 7.1-mile Patapsco Howard County Thru Trail, a moderate route through Patapsco Valley State Park with river views and historical sit

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

3.74 km

Wood Marr Trail

Highlight (Segment) • Trail

This trail follows the railroad then enters the forest, climbs the ridge and runs parallel to the river course. Very nice!

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B

11.4 km

End point

Parking

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Way Types & Surfaces

Way Types

8.87 km

2.54 km

< 100 m

Surfaces

8.87 km

2.55 km

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Elevation

Elevation

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Weather

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Today

Friday 17 July

32°C

21°C

0 %

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Max wind speed: 11.0 km/h

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Frequently Asked Questions

Where can I park to access the Patapsco Howard County Thru Trail?

The trail is located within Patapsco Valley State Park, which has multiple access points and parking areas. Specific parking details can vary depending on which section of the trail you plan to hike. It's advisable to check the official park website for the most current parking information and directions to trailheads.

Is the Patapsco Howard County Thru Trail dog-friendly?

Yes, dogs are generally allowed on the trails within Patapsco Valley State Park. However, they must be kept on a leash at all times, and you are responsible for cleaning up after your pet.

When is the best time of year to hike this trail?

The trail can be enjoyed year-round, but spring and fall often offer the most pleasant hiking conditions with mild temperatures and beautiful foliage. Summer can be hot and humid, while winter may bring colder temperatures and potential for snow or ice, requiring appropriate gear.

Are there any entrance fees or permits required for hiking in Patapsco Valley State Park?

Yes, Patapsco Valley State Park typically charges an entrance fee. Fees can vary by season, day of the week, and residency. For the most up-to-date information on entrance fees and any potential permit requirements, it's best to consult the official Maryland Department of Natural Resources website: maryland.gov.

What is the terrain like on the Patapsco Howard County Thru Trail?

The trail offers a varied and challenging terrain. You'll encounter a mix of easy, relatively flat double-track sections, especially along the Patapsco River, as well as considerable hills and climbs along ridges with cutbacks. Some areas can also be wet and muddy, so appropriate footwear is recommended.

What interesting features or views can I expect along the route?

The trail traverses diverse landscapes within Patapsco Valley State Park, offering scenic views of the Patapsco River, forests, and open fields. A notable section is the Wood Marr Trail. You'll also find historical elements, such as remnants of the B&O Railroad's original alignment and bridge abutments from the 1830s.

Does this trail connect with other paths in Patapsco Valley State Park?

Yes, the Patapsco Howard County Thru Trail is part of an extensive network within Patapsco Valley State Park. It directly covers the Patapsco Traverse (south hiking) and Patapsco Traverse (south mtb) trails entirely, and also intersects with sections of the Patapsco Alt HoCo Thru Trail, Wood-Marr (HoCo Thru Trail), Thru Trail (white), and the River Trail, among others.

Is the Patapsco Howard County Thru Trail suitable for families or beginners?

Due to its length of over 11 km and moderate difficulty, the full Patapsco Howard County Thru Trail might be challenging for young children or absolute beginners. However, Patapsco Valley State Park offers many shorter, easier trails that are more family-friendly. You can explore specific sections of this trail or other park trails for a less strenuous experience.

How long does it typically take to complete the Patapsco Howard County Thru Trail?

Based on its distance and moderate difficulty, completing the entire 11.4 km route typically takes around 3 hours. This duration can vary significantly depending on your pace, the number of stops you make, and current trail conditions.

What is the historical significance of the area around the trail?

The area is rich in history, being home to Patapsco Valley State Park, Maryland's oldest state park established in 1907. It was a site for some of Maryland's earliest mills and factories, and notably, America's first common-carrier railroad. Sections of the trail, like the Old Main Line Trail, follow the original 1831 B&O Railroad alignment, with visible historical structures.

Are there any specific sections of the trail that are easier or more challenging?

Yes, the trail offers varied difficulty. Some sections, particularly those along the Patapsco River, are described as relatively flat and mostly double-track, making them easier. Conversely, areas like the Woodstock section feature considerable hills and climbs along ridges, presenting a more challenging experience. You can choose sections based on your desired difficulty.

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