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 Oct 13, 11:50 AM ET

Today's verdict

Marginal conditions — get the road bike out if you have to.

21 mph wind — noticeable — pacing will shift with the wind.

49 /100

49 Road

64 E-bike

Best for e-bike riding today

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

75°F

Mostly Clear
Wind

21 mph

SW
Rain

2%

Next 24h: 0.00"
Air quality

AQI 51

PM2.5 · Moderate
Humidity

54%

Surface & daylight

Pavement

dry

mixed surface
Sunrise

7:14 AM
Sunset

6:31 PM

403 min remaining

Best time today

12 PM looks best — 74°F · 6 mph SW wind · sunny. 1 PM is a close second (58/100).

12 PM Best

74°

Sunny

6 mph SW

1 PM

77°

Sunny

7 mph SW

2 PM

79°

Sunny

8 mph SW

3 PM

80°

Sunny

9 mph SW

4 PM

80°

Sunny

9 mph SW

5 PM

81°

Sunny

8 mph SW

6 PM

79°

Mostly Clear

8 mph SW

Wind on this route

21 mph crosswind — expect a 21 mph quartering headwind on the return.

Currently 21 mph from the SSW (210°). Relative to this ride's overall bearing, a crosswind.

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

Elevation profile

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

Score breakdown

75°F air Within comfort range, outside ideal

-3

−

21 mph wind Noticeable — pacing will shift with the wind.

-6

−

Strong crosswind 21 mph crosswind — expect a 21 mph quartering headwind on the return.

-3

Pavement: dry Clean dry pavement — maximum grip.

AQI 51 Moderate air — fine for shorter commutes, cut intervals short.

-3

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.