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 Aug 11, 1:23 AM 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.
70°F air — right in road cycling's sweet spot

0 /100

skip

0 Bike commuting

0 Road

0 E-bike

0 Bike-share

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 temp

70°F

Mostly Clear
Wind

— mph

W
Rain

36%

Next 24h: 0.58"

Surface & daylight

Pavement

wet

paved surface
Sunrise

6:18 AM
Sunset

8:09 PM

1127 min remaining

Best time today

3 AM looks best — 72°F · 3 mph W wind · mostly cloudy. 4 AM is a close second (38/100).

2 AM

73°

Mostly Cloudy

5 mph W

3 AM Best

72°

Mostly Cloudy

3 mph W

4 AM

72°

Mostly Cloudy

3 mph W

5 AM

72°

Mostly Cloudy

5 mph W

6 AM

72°

Partly Sunny

3 mph W

7 AM

72°

Partly Sunny

3 mph W

8 AM

73°

Partly Sunny

5 mph NW

9 AM

76°

Partly Sunny

6 mph W

10 AM

80°

Mostly Sunny

6 mph W

11 AM

82°

Partly Sunny

6 mph W

12 PM

84°

Mostly Sunny

7 mph W

1 PM

85°

Mostly Sunny

8 mph W

2 PM

85°

Chance Showers And Thunderstorms

8 mph W

—

3 PM

86°

Chance Showers And Thunderstorms

7 mph W

—

4 PM

86°

Showers And Thunderstorms Likely

8 mph W

—

5 PM

85°

Showers And Thunderstorms Likely

7 mph NW

—

6 PM

84°

Chance Showers And Thunderstorms

7 mph NW

—

7 PM

82°

Chance Showers And Thunderstorms

6 mph NW

—

Wind on this route

Calm — wind is a non-factor today.

Currently 0 mph from the N (0°). Relative to this ride's overall bearing, a crosswind.

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

Elevation profile

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

Score breakdown

70°F air Right in road cycling's sweet spot

+10

−

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

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.