Lost Lake – Patapsco Valley State Park loop from BWI Thurgood Marshall Airport
Lost Lake – Patapsco Valley State Park loop from BWI Thurgood Marshall Airport
4.8
(6896)
11,253
riders
Lost Lake – Patapsco Valley State Park loop from BWI Thurgood Marshall Airport
02:16
35.6km
310m
Cycling
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.
Last updated: June 16, 2026
Tips
Includes a segment in which cycling is not permitted
After 9.68 km for 114 m
Waypoints
Start point
Train Station
Get Directions
7.43 km
Lost Lake
Highlight • Lake
Tip by
9.74 km
Swinging Bridge, Patapsco Valley State Park
Highlight • Bridge
On the bridge you'll have great views of the river and surrounding woodland.
It isn't too high up, so even if you're afraid of heights it's still worth passing over the bridge. Be courteous of other pedestrians as the bridge is fairly narrow!
Tip by
11.1 km
Viewpoint
Viewpoint
11.6 km
Swinging Bridge on Grist Mill Trail
Highlight • Bridge
It is best to walk over the bridge as it is not very wide and there may be pedestrians.
The surface is mostly paved and quite flat so well suited to families and kids.
There are various historic sites of interest alongside the trail, including the famous swinging bridge, which was originally used by mill workers to cross the river.
Tip by
11.7 km
Tip by
13.4 km
Patapsco Valley State Park Gray's Mill Area
Nature Reserve
19.8 km
Oella Homeowners Association Private Open Space
Nature Reserve
23.2 km
Patapsco Valley State Park
Highlight • Forest
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.
Tip by
35.6 km
End point
Train Station
Way Types & Surfaces
Way Types
15.3 km
8.41 km
7.68 km
4.24 km
< 100 m
< 100 m
Surfaces
23.8 km
8.86 km
1.70 km
1.29 km
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Elevation
Highest point (140 m)
Lowest point (10 m)
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Weather
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Saturday 27 June
27°C
22°C
-- %
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
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