Rockville, MD · separated · paved

Great Seneca Highway Bicycle Route

4.4 mi Out-and-back 171 ft gain

4.4-mile paved route with 171 ft of elevation gain, signed as part of the regional cycle network, route reference “119”, separated from motor traffic.

Live · updated Nov 7, 3:37 AM ET

Today's verdict

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

41 mph wind — gusty and hazardous on exposed bridges and overpasses.
50°F air — right in road cycling's sweet spot

37 /100

45 Bike commuting

37 Road

51 E-bike

42 Bike-share

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

50°F

Cloudy
Wind

41 mph

NW
Rain

1%

Next 24h: 0.00"
Air quality

AQI 33

PM2.5 · Good

Surface & daylight

Pavement

dry

paved surface
Sunrise

6:43 AM
Sunset

5:02 PM

805 min remaining

Best time today

9 AM looks best — 50°F · 13 mph NW wind · sunny. 10 AM is a close second (71/100).

4 AM

46°

Mostly Cloudy

12 mph NW

5 AM

45°

Partly Cloudy

10 mph NW

6 AM

44°

Sunny

9 mph NW

7 AM

43°

Sunny

9 mph NW

8 AM

45°

Sunny

12 mph NW

9 AM Best

50°

Sunny

13 mph NW

10 AM

52°

Mostly Sunny

13 mph NW

11 AM

54°

Mostly Sunny

13 mph NW

12 PM

56°

Mostly Sunny

14 mph NW

1 PM

57°

Mostly Sunny

15 mph NW

2 PM

57°

Mostly Sunny

16 mph NW

3 PM

57°

Mostly Sunny

16 mph NW

4 PM

56°

Mostly Sunny

17 mph NW

Wind on this route

41 mph headwind outbound — expect a 41 mph headwind on the return.

Currently 41 mph from the WNW (300°). Relative to this ride's overall bearing, a quartering headwind.

Leg 1 Bearing 304° · headwind 0.4 mi
Leg 2 Bearing 282° · headwind 0.4 mi
Leg 3 Bearing 273° · headwind 0.4 mi
Leg 4 Bearing 312° · headwind 0.4 mi
Leg 5 Bearing 327° · headwind 0.4 mi
Leg 6 Bearing 334° · quartering headwind 0.4 mi
Leg 7 Bearing 18° · crosswind 0.4 mi
Leg 8 Bearing 15° · crosswind 0.4 mi

Elevation profile

229 ft gain 193 ft loss Max 469' Min 302' 4.2 mi sampled

Score breakdown

50°F air Right in road cycling's sweet spot

+10

−

41 mph wind Gusty and hazardous on exposed bridges and overpasses.

-36

−

Quartering headwind 41 mph headwind outbound — expect a 41 mph headwind on the return.

-4

Pavement: dry Clean dry pavement — maximum grip.

AQI 33 Clean air

Advisories & nearby alerts

NWSTest Message

About this route

Distance: 4.4 mi one-way (double for round-trip)
Elevation gain: 171 ft
Surface: paved
Shape: Out-and-back
Traffic exposure: separated
Activities: road cycling · e bike · commuting · bike share-touring
Cycle network: RCN · route 119
Start: 39.1334, -77.2450
City hub: Rockville, MD
OSM: relation 17202907

Description sourced from OpenStreetMap relation tags and member-way geometry.