Hole 1
Par 4 · 388 yd
Plays south. Dogleg left. 5 bunkers.
Green 37 yd deep, 34 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Dulles, Virginia, USA
18 holes, par 72, about 5,566 yards (5,090 metres) along the hole lines. The par 3s are 7, 14 and 16. The par 5s are 3, 15 and 17. The longest hole is the 3rd at 464 yd, the shortest the 14th at 106 yd. The map shows 48 bunkers. Water is in play on holes 2, 3, 4, 5, 7, 8, 11, 12, 13, 14, 15 and 18.
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 · 388 yd
Plays south. Dogleg left. 5 bunkers.
Green 37 yd deep, 34 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 340 yd
Plays north-west. 2 bunkers and water.
Green 26 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 464 yd
Plays north. 5 bunkers and water.
Green 24 yd deep, 26 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 304 yd
Plays north-east. 2 bunkers and water.
Green 21 yd deep, 27 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 162 yd
Plays north-west. 1 bunker and water.
Green 28 yd deep, 34 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 348 yd
Plays east. 3 bunkers.
Green 36 yd deep, 37 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 147 yd
Plays west. 3 bunkers and water.
Green 35 yd deep, 25 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 336 yd
Plays south-west. 4 bunkers and water.
Green 33 yd deep, 30 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 299 yd
Plays south-east. 3 bunkers.
Green 33 yd deep, 35 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 289 yd
Plays north-west. Dogleg right. 3 bunkers.
Green 34 yd deep, 28 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 337 yd
Plays north. Dogleg left. 2 bunkers and water.
Green 35 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 350 yd
Plays south. 2 bunkers and water.
Green 37 yd deep, 24 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 350 yd
Plays north. 3 bunkers and water.
Green 34 yd deep, 25 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 106 yd
Plays south-east. 1 bunker and water.
Green 35 yd deep, 34 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 452 yd
Plays south. 4 bunkers and water.
Green 35 yd deep, 21 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 108 yd
Plays west. 4 bunkers.
Green 37 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 441 yd
Plays south. 5 bunkers.
Green 31 yd deep, 25 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 346 yd
Plays north-east. 3 bunkers and water.
Green 35 yd deep, 33 yd wide. Nearly flat 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.