The A821 (Duke's Pass) on a motorcycle
Our routes ride 14 miles of the A821 (Loch Lomond and the Trossachs, United Kingdom). Its longest stretch on our routes turns 267 degrees a mile, in the twistiest third of the 151 roads we track.
- On our routes
- 14 miles
- Curvature
- 267 ° a mile
- Twistiness rank
- 28 of 151
- Longest gap between fuel
- 13 miles
The A821 is drawn in black where our routes use it. Red lines are the full routes; click one to open it.
Routes that ride the A821
| Route | Miles on the A821 | |
|---|---|---|
| Trossachs Trail38 miles in all | 14 | GPX |
How we measure it
Curvature is the total change of direction along the road, in degrees for every mile, measured on the route line every 100 metres. Gentle drift under 3 degrees is ignored, so a long sweeping bend counts for less than a run of tight ones. On our routes they run from 6 on the E19 to 701 on the SP638.
Fuel counts stations within 1 km of the line on its longest stretch on our routes (14 miles), from OpenStreetMap. There are 1 on that stretch.