Columbia, MD · mostly separated · mixed

Grist Mill Trail

2.5 mi Out-and-back 266 ft gain

The Grist Mill Trail is a 5.0 mile long hiking and biking trail located in Patapsco Valley State Park in the Baltimore County side of the Patapsco Valley near Catonsville, Maryland. The paved pathway runs parallel to the Baltimore and Ohio Railroad to the north, and the Patapsco River to the south.

Live · updated Jul 28, 1:51 PM ET

Today's verdict

Thunderstorms in the forecast — lightning and cyclists are a bad combination.

Thunderstorms — lightning and cyclists do not mix — get off the road before they arrive.
Pavement: wet — wet during the likely ride window — reduced braking, road spray, limited visibility to drivers.
NWS alert active — check the alert before rolling out.
29 mph wind — strong — plan for slow outbound if wind is against you.

0 /100

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0 Road

0 E-bike

Best for road cycling today

NWSFlood Watch

Flood Watch issued July 28 at 10:25AM EDT until July 29 at 2:00AM EDT by NWS Baltimore MD/Washington DC

In effect through Jul 29, 6:00 AM

Route map

Orange marker is the start. Click the map to enable scroll-zoom — the polyline is approximate; use Ride with GPS or Komoot for turn-by-turn.

Atmosphere

Air temp

81°F

Partly Cloudy
Wind

29 mph

SW
Rain

94%

Next 24h: 0.65"
Humidity

70%

Surface & daylight

Pavement

wet

mixed surface
Sunrise

6:03 AM
Sunset

8:23 PM

393 min remaining

Best time today

Every remaining hour today is flagged hazardous. Save it for tomorrow.

Wind on this route

29 mph tailwind outbound — expect a 29 mph quartering headwind on the return.

Currently 29 mph from the S (180°). Relative to this ride's overall bearing, a quartering tailwind.

Leg 1 Bearing 282° · crosswind 0.2 mi
Leg 2 Bearing 286° · crosswind 0.2 mi
Leg 3 Bearing 303° · quartering tailwind 0.2 mi
Leg 4 Bearing 328° · quartering tailwind 0.2 mi
Leg 5 Bearing 314° · quartering tailwind 0.2 mi
Leg 6 Bearing 320° · quartering tailwind 0.2 mi
Leg 7 Bearing 327° · quartering tailwind 0.2 mi
Leg 8 Bearing 313° · quartering tailwind 0.2 mi

Elevation profile

477 ft gain 408 ft loss Max 217' Min 46' 2.4 mi sampled

Score breakdown

81°F air Within comfort range, outside ideal

-3

−

29 mph wind Strong — plan for slow outbound if wind is against you.

-18

Quartering tailwind 29 mph tailwind outbound — expect a 29 mph quartering headwind on the return.

−

Thunderstorms Lightning and cyclists do not mix — get off the road before they arrive.

-45

−

Pavement: wet Wet during the likely ride window — reduced braking, road spray, limited visibility to drivers.

-32

−

NWS alert active Check the alert before rolling out.

-20

About this route

Distance: 2.5 mi one-way (double for round-trip)
Elevation gain: 266 ft
Surface: mixed
Shape: Out-and-back
Traffic exposure: mostly separated
Activities: road cycling · e bike
Cycle network: LCN · route GMT
Operator: Maryland Department of Natural Resources Maryland Park Service
Start: 39.2306, -76.7294
City hub: Columbia, MD
OSM: relation 12290215

Description sourced from the Wikipedia summary.