4.5
(42)
996
riders
54
rides
Patapsco Valley State Park Gray'S Mill Area mountain bike trails traverse a diverse landscape characterized by a river valley, lush forests, and varied terrain. The park extends along the Patapsco River, featuring elevation changes and a network of trails suitable for mountain biking. Riders can expect a mix of singletrack, forested climbs, and flowy ridges within this extensive natural area. This region offers a range of trails from gentle paths to more demanding routes.
Last updated: June 29, 2026
5.0
(1)
51
riders
36.2km
02:36
380m
380m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
18
riders
28.2km
02:21
480m
480m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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13
riders
22.2km
01:56
360m
360m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(1)
34
riders
42.1km
03:46
680m
680m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
10
riders
24.1km
02:09
390m
400m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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It gets very cold as you get close to Patapsco River near the bridge. The bridge does move a little but very secure as you cross it. Be mindful if youβre wearing a skirt (Ms Monroe)
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Camelβs Den Cave is a small, shallow shelter cave nestled in the Daniels Area of Patapsco Valley State Park. It's a slight detour off Daniels Singletrack and you will need to carry your bike down a couple of steps.
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The Grist Mill Trail crosses over the Patapsco River here. You get a great view over the water from here too.
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Peaceful Pond is located in the Hollofield Area of Patapsco Valley State Park. It's encircled by a short trail that connects to the rest of the park's trail system.
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This section of the State Park has a few different bike trails to choose from. The Rockhaven Trail is one of the easier trails while Jane and and Roxy (The Rocks) trails will give you plenty of challenges.
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This area of Patapsco Park is less frequently trafficked, but just as pleasant as the southern trail system. A true hidden gem! There are a few small stream crossings and plenty of interconnected trails to explore.
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The Gray's Mill Trail starts near the old mill house, which has an informative signpost outside describing the history of the mill. There are a number of other historic repurposed mill houses up the road in Ellicott City.
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The Patapsco Valley was Maryland's first and remains its largest state park. The 14,000 acres (5,700 ha) are made up of forests, winding rivers and cascading waterfalls. It's a great place for hiking, camping, canoeing, horseback riding and mountain biking. Or simply just bring a picnic and relax by the river. Some historical sites are also worth visiting in the park such as the Thomas Viaduct and Orange Grove Flour Mill.
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There are over 50 mountain bike trails in the Patapsco Valley State Park Gray'S Mill Area. The park offers a diverse network, extending along the Patapsco River, with options ranging from gentle paths to more demanding routes.
The terrain in Patapsco Valley State Park Gray'S Mill Area is quite varied, featuring a mix of singletrack, forested climbs, and flowy ridges. You'll encounter elevation changes and picturesque river valley landscapes, providing a dynamic riding experience.
Yes, the park offers trails for various skill levels. There are 13 easy mountain bike routes, which are great for beginners or families looking for a more relaxed ride. The McKeldin Area, part of Patapsco Valley State Park, also features Maryland's first adaptive mountain biking trail system, designed to be more accessible.
For experienced riders seeking a challenge, consider the Patapsco River Bridge loop from Frederick Village. This 11.3-mile route is rated as difficult and features significant elevation changes and scenic river vistas. Another demanding option is the Lost Lake loop from Catonsville, a 27.3 km trail with considerable elevation gain.
Yes, many trails in the area are designed as loops. A popular option is the Swinging bridge loop from Worthington, which is 5.4 miles long and takes you through wooded areas and past historical features. Another excellent loop is the Lost Lake loop from Patapsco Woods, an easy 12.3 km route.
You'll find a wealth of natural beauty and historical landmarks. The trails often run alongside the scenic Patapsco River, offering picturesque views. You can also discover lush forests, and areas like Lost Lake, a man-made lake. The park is also home to several popular swinging bridges, such as one in the Avalon Area, providing great photo opportunities.
Absolutely. The Gray's Mill Area itself is named after a historic cotton textile mill. Throughout the park, you can find remnants of old mills, factories, and railroad history, with interpretive signs detailing the valley's past. The Daniels Area, for instance, was once a thriving mill community and features the Daniels Dam.
Patapsco Valley State Park is generally dog-friendly, but specific regulations for trails may apply. It's always best to keep dogs on a leash and ensure they are well-behaved around other trail users and wildlife. Please check park signage for any specific restrictions on certain trails.
The trails in Patapsco Valley State Park Gray'S Mill Area are highly rated by the komoot community, with an average score of 4.5 stars from over 60 reviews. Riders frequently praise the varied terrain, the beautiful river views, and the extensive network that allows for endless exploration and connection of different areas.
The park offers enjoyable mountain biking throughout much of the year. Spring and fall are particularly popular due to milder temperatures and vibrant foliage. Summer can be warm, but the lush forests provide good shade. Winter riding is possible, but conditions can vary, so checking trail status for ice or mud is advisable.
Yes, parking is available at various access points within Patapsco Valley State Park, including areas that serve the Gray's Mill trails. Specific parking lots can be found near trailheads, but it's always a good idea to arrive early on busy days, especially weekends, as spaces can fill up quickly.


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