4.6
(6291)
18,189
hikers
01:21
5.12km
30m
Hiking
The Grist Mill Trail offers a delightful, easy hike through Patapsco Valley State Park, tracing the Patapsco River on a wide, paved asphalt path. You'll enjoy close-up views of the river and heavily wooded scenery, especially vibrant during fall. Along the way, you can cross one of the fun Swinging…
Last updated: June 9, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Waypoints
Start point
Parking
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441 m
Highlight • Lake
Tip by
1.01 km
Highlight • Trail
Tip by
2.78 km
Highlight • Bridge
Tip by
2.89 km
Highlight • Bridge
Tip by
4.07 km
Highlight • Monument
Tip by
4.40 km
Highlight • Viewpoint
Tip by
4.92 km
Highlight • Bridge
Tip by
5.12 km
End point
Parking
Way Types & Surfaces
Way Types
4.24 km
412 m
231 m
221 m
< 100 m
Surfaces
2.75 km
1.52 km
449 m
276 m
103 m
< 100 m
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Elevation
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Sunday 5 July
34°C
21°C
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This route was planned by komoot.
The Grist Mill Trail features a primarily wide and paved surface, making it relatively flat and easy to navigate. It runs alongside the Patapsco River and active train tracks, offering a smooth experience suitable for various activities.
Yes, the Grist Mill Trail is considered easy and highly accessible. Its paved, relatively flat terrain with a maximum grade of 4% makes it ideal for beginners, families, and those with strollers or disabilities. It's a less strenuous option compared to other trails in Patapsco Valley State Park.
You'll encounter a blend of natural beauty and historical elements. Highlights include the ruins of the Orange Grove Flour Mill, the site of the former Bloede's Dam, and remnants of the historic B&O Railroad. Don't miss the fun Swinging Bridge, Patapsco Valley State Park and another Swinging Bridge on Grist Mill Trail. You'll also enjoy views of the Patapsco River and active train tracks, with a notable Grist Mill Trail viewpoint.
The Grist Mill Trail is primarily an out-and-back route. It extends approximately 2.5 miles in one direction, from Ilchester Road to Lost Lake, making it about 5 miles round trip.
Parking is available at various points along the trail, including near the Vineyard Spring Trailhead. Given its popularity, especially on weekends, arriving earlier in the day is recommended to secure a spot.
Yes, the trail is dog-friendly. Please ensure your dog remains on a leash and that you clean up after them to help keep the park enjoyable for everyone.
The trail is enjoyable year-round. Its heavily wooded surroundings provide significant shade, making it bearable even on hot days. Spring and fall offer pleasant temperatures and beautiful foliage, while winter can provide a unique, serene experience, though conditions may vary.
As the Grist Mill Trail is located within Patapsco Valley State Park, standard Maryland State Park entrance fees may apply, especially during peak seasons or specific times. It's advisable to check the official Maryland State Parks website for current fee schedules and regulations before your visit.
Yes, while the main route is the Grist Mill Trail, it also passes through sections of the Patapsco Alt HoCo Thru Trail. Additionally, numerous dirt trails of varying lengths and skill levels, such as Garrett's Pass and Vineyard Spring Trail, branch off from it, offering options for more challenging hikes.
Its unique appeal lies in its blend of accessibility, historical significance, and scenic river views. Unlike many of the park's more rugged, natural-surface trails that climb hillsides, this trail offers a generally flat, paved surface, making it suitable for a wider range of users. The presence of active train tracks and historical ruins like the Ilchester Tunnel and multiple swinging bridges also adds to its distinctive character.
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