Arlington, VA · mostly separated · mixed

66 Parallel Trail

15.8 mi Out-and-back 308 ft gain

15.8-mile mixed route with 308 ft of elevation gain, signed as part of the local cycle network, route reference “66”, mostly separated from motor traffic.

Live · updated Jul 12, 11:09 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.
25 mph wind — strong — plan for slow outbound if wind is against you.
Headwind on this route — 25 mph headwind outbound — expect a 25 mph headwind on the return.

0 /100

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0 Road

0 E-bike

Best for road cycling 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

79°F

Cloudy
Wind

25 mph

E
Rain

40%

Next 24h: 0.00"
Humidity

74%

Surface & daylight

Pavement

wet

mixed surface
Sunrise

5:54 AM
Sunset

8:35 PM

568 min remaining

Best time today

8 PM looks best — 76°F · 6 mph E wind · mostly cloudy.

12 PM

81°

Slight Chance Showers And Thunderstorms

7 mph E

—

1 PM

83°

Chance Showers And Thunderstorms

7 mph E

—

2 PM

83°

Chance Showers And Thunderstorms

8 mph E

—

3 PM

83°

Chance Showers And Thunderstorms

8 mph E

—

4 PM

82°

Chance Showers And Thunderstorms

8 mph E

—

5 PM

82°

Slight Chance Showers And Thunderstorms

8 mph E

—

6 PM

80°

Slight Chance Showers And Thunderstorms

8 mph E

—

7 PM

79°

Slight Chance Showers And Thunderstorms

7 mph SE

—

8 PM Best

76°

Mostly Cloudy

6 mph E

Wind on this route

25 mph headwind outbound — expect a 25 mph headwind on the return.

Currently 25 mph from the ENE (60°). Relative to this ride's overall bearing, a headwind.

Leg 1 Bearing 77° · headwind 1.4 mi
Leg 2 Bearing 40° · headwind 0.9 mi
Leg 3 Bearing 77° · headwind 1.4 mi
Leg 4 Bearing 70° · headwind 1.2 mi
Leg 5 Bearing 90° · headwind 1.0 mi
Leg 6 Bearing 62° · headwind 0.5 mi
Leg 7 Bearing 79° · headwind 1.4 mi
Leg 8 Bearing 77° · headwind 1.3 mi

Elevation profile

518 ft gain 371 ft loss Max 463' Min 240' 12.9 mi sampled

Score breakdown

79°F air Within comfort range, outside ideal

-3

−

25 mph wind Strong — plan for slow outbound if wind is against you.

-18

−

Headwind on this route 25 mph headwind outbound — expect a 25 mph headwind on the return.

-8

−

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

About this route

Distance: 15.8 mi one-way (double for round-trip)
Elevation gain: 308 ft
Surface: mixed
Shape: Out-and-back
Traffic exposure: mostly separated
Activities: road cycling · e bike
Cycle network: LCN · route 66
Start: 38.8350, -77.4565
City hub: Arlington, VA
OSM: relation 15902152

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