Patapsco Valley State Park

Avalon History Center


Contact: 410-461-5005​
E-mail Patapsco Valley State Park

Baltimore and Howard Counties

Patapsco Valley State Park
8020 Baltimore National Pike
Ellicott City, MD 21043​

Hours: 9 a.m. to Sunset

This month's events:​​​​

Plan Ahead, Parks Can Fill Up 

Patapsco Valley State Park extends along 32 ​miles of the Patapsco River, encompassing 16,043 acres and eight developed recreational areas. Recreational opportunities include hiking, fishing, camping, canoeing, horseback and mountain bike trails, as well as picnicking for individuals or large groups in the park’s many popular pavilions.

​Photo by Rob Dyke​

The park is nationally known for its trail opportunities and scenery. We have over 200 miles of trails, with 70 of those miles identified as maintained trails. There are hiker-only trails and multi-use trails accessible from many areas of Patapsco.​

Around the Park!

Click the Poster to Learn More!

​​ Want to Live in Nature?  



Grist Mill Trail

Updated information February 6, 2023

Closure will start Monday October 17th 2022​

The Grist Mill Trail will be closed after Labor Day Weekend to permanently repair the footbridges. The trail will be closed for approximately 12 months. The Grist Mill Trail from the Patterson Viaduct footbridge off of Ilchester Rd will remain open to the Buzzards Rock trail connection. Please respect the closure as it will be unsafe to walk, bike or horse ride in the construction area due to heavy equipment use and no stream crossings. The Swinging Bridge will be open for foot traffic but not to access the Grist Mill Trail. Plan ahead, for more information click here.​


Hilton Area Closures

Updated information April 21, 2023

The Hilton Area of Patapsco Valley State Park will be closed weekdays to vehicular traffic from April 17th to April 28th​, weather permitting. Foot traffic may be be limited in some areas. Paving and roadside work will be taking place. Plan accordingly, there is very little legal street parking on Hilton Ave. Alternatives are the Hollofield Area 8020 Baltimore National Pike Ellicott City, MD 21043 and the Avalon Area 5120 South Street Halethorpe, MD 21227​.​

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