Rockville, MD · separated · paved

Carl Henn Millennium Trail

10.7 mi Loop 276 ft gain

10.7-mile paved loop with 276 ft of elevation gain, signed as part of the regional cycle network, route reference “CHMT”, operated by City of Rockville, 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

38 /100

46 Bike commuting

38 Road

52 E-bike

43 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

6:42 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 (75/100).

4 AM

47°

Mostly Cloudy

13 mph NW

5 AM

46°

Partly Cloudy

10 mph NW

6 AM

45°

Mostly Sunny

9 mph NW

7 AM

44°

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

14 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 crosswind — keep the bars loose on exposed sections.

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

Leg 1 Bearing 122° · tailwind 0.9 mi
Leg 2 Bearing 98° · tailwind 0.9 mi
Leg 3 Bearing 50° · quartering tailwind 0.8 mi
Leg 4 Bearing 14° · crosswind 0.9 mi
Leg 5 Bearing 358° · quartering headwind 0.7 mi
Leg 6 Bearing 313° · headwind 0.9 mi
Leg 7 Bearing 272° · headwind 1.0 mi
Leg 8 Bearing 241° · quartering headwind 1.0 mi

Elevation profile

290 ft gain 296 ft loss Max 482' Min 331' 8.9 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

−

Strong crosswind 41 mph crosswind — keep the bars loose on exposed sections.

-3

Pavement: dry Clean dry pavement — maximum grip.

AQI 33 Clean air

Advisories & nearby alerts

NWSTest Message

About this route

Distance: 10.7 mi loop
Elevation gain: 276 ft
Surface: paved
Shape: Loop
Traffic exposure: separated
Activities: road cycling · e bike · commuting · bike share-touring
Cycle network: RCN · route CHMT
Operator: City of Rockville
Start: 39.0753, -77.1820
City hub: Rockville, MD
OSM: relation 2413852

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