Hole 1
Par 4 · 387 yd
Plays south. 3 bunkers.
Green 32 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Herndon, Virginia, USA
18 holes, par 71, about 6,719 yards (6,144 metres) along the hole lines. The par 3s are 3, 6, 11 and 16. The par 5s are 2, 5 and 15. The longest hole is the 2nd at 538 yd, the shortest the 11th at 170 yd. The map shows 51 bunkers. Water is in play on holes 5, 6, 8, 14 and 16.
Every hole, numbered, as the app draws it.
Each hole turned so it plays up the page, from the tee at the bottom. Every green's slopes are mapped: flip a card to see its green.
Par 4 · 387 yd
Plays south. 3 bunkers.
Green 32 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 538 yd
Plays east. 3 bunkers.
Green 28 yd deep, 24 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 179 yd
Plays north. 3 bunkers.
Green 28 yd deep, 31 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 420 yd
Plays south. 2 bunkers.
Green 34 yd deep, 26 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 511 yd
Plays south. Dogleg right. 3 bunkers and water.
Green 35 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 203 yd
Plays north. 2 bunkers and water.
Green 31 yd deep, 30 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 414 yd
Plays north-west. Dogleg left. 4 bunkers.
Green 35 yd deep, 30 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 382 yd
Plays west. Dogleg right. 2 bunkers and water.
Green 34 yd deep, 34 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 408 yd
Plays north. Dogleg right. 3 bunkers.
Green 34 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 463 yd
Plays east. 2 bunkers.
Green 35 yd deep, 26 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 170 yd
Plays south-east. 3 bunkers.
Green 30 yd deep, 35 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 430 yd
Plays south-east. Dogleg left. 3 bunkers.
Green 36 yd deep, 32 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 437 yd
Plays south-east. Dogleg left. 3 bunkers.
Green 38 yd deep, 36 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 367 yd
Plays north-west. 2 bunkers and water.
Green 33 yd deep, 33 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 519 yd
Plays north-west. Dogleg right. 3 bunkers.
Green 35 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 196 yd
Plays north-west. 2 bunkers and water.
Green 34 yd deep, 32 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 410 yd
Plays west. 1 bunker.
Green 35 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 285 yd
Plays south. 5 bunkers.
Green 38 yd deep, 32 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Lengths are measured along each hole's line on OpenStreetMap, so they can differ from the club's card. A bunker between two holes counts on both.
The app
On your iPhone and Apple Watch, Number & Line turns this map into a yardage book, with distances to the front, middle and back of each green from where you stand. You can plan each hole at home and get club advice from your own distances and the day's wind.
The app is coming soon to the App Store, and this course is already built for it.

Course map © OpenStreetMap contributors, under the Open Database Licence. See it on OpenStreetMap, where anyone can correct it. Green slopes: USGS 3D Elevation Program 1 m DEM (public domain). Our maps are open data too. Number & Line isn't connected with the club.