Rockville, MD · separated · paved
Great Seneca Highway Bicycle Route
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
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.
- 21 mph wind — noticeable — pacing will shift with the wind.
Best for bike commuting 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 temp77°FClear
- Wind21 mphSW
- Rain91%Next 24h: 1.14"
- Humidity78%
Surface & daylight
- Pavementwetpaved surface
- Sunrise6:05 AM
- Sunset8:25 PM600 min remaining
Best time today
Every remaining hour today is flagged hazardous. Save it for tomorrow.
Wind on this route
21 mph tailwind outbound — expect a 21 mph headwind on the return.
Currently 21 mph from the SSW (210°). Relative to this ride's overall bearing, a quartering tailwind.
- Leg 1 Bearing 304° · crosswind 0.4 mi
- Leg 2 Bearing 282° · crosswind 0.4 mi
- Leg 3 Bearing 273° · quartering headwind 0.4 mi
- Leg 4 Bearing 312° · crosswind 0.4 mi
- Leg 5 Bearing 327° · quartering tailwind 0.4 mi
- Leg 6 Bearing 334° · quartering tailwind 0.4 mi
- Leg 7 Bearing 18° · tailwind 0.4 mi
- Leg 8 Bearing 15° · tailwind 0.4 mi
Elevation profile
Score breakdown
Advisories & nearby alerts
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.