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 Jul 28, 1:51 PM 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.
41 mph wind — gusty and hazardous on exposed bridges and overpasses.
Pavement: wet — wet during the likely ride window — reduced braking, road spray, limited visibility to drivers.

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

82°F

Mostly Cloudy
Wind

41 mph

SW
Rain

85%

Next 24h: 0.83"
Humidity

70%

Surface & daylight

Pavement

wet

paved surface
Sunrise

6:05 AM
Sunset

8:24 PM

395 min remaining

Best time today

Every remaining hour today is flagged hazardous. Save it for tomorrow.

Wind on this route

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

Currently 41 mph from the SSE (150°). Relative to this ride's overall bearing, a crosswind.

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

Elevation profile

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

Score breakdown

82°F air Within comfort range, outside ideal

-3

−

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

−

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.