Hole 1
Par 4 · 280 yd
Plays east. 3 bunkers.
Green 26 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Hartsdale, New York, USA
18 holes, par 70, about 5,836 yards (5,336 metres) along the hole lines. The par 3s are 3, 7, 9, 11 and 14. The par 5s are 8, 12 and 17. The longest hole is the 17th at 503 yd, the shortest the 3rd at 140 yd. The map shows 50 bunkers. Water is in play on holes 8, 17 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 · 280 yd
Plays east. 3 bunkers.
Green 26 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 294 yd
Plays west. 2 bunkers.
Green 24 yd deep, 19 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 140 yd
Plays north-east. 1 bunker.
Green 23 yd deep, 23 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 421 yd
Plays north-east. 6 bunkers.
Green 35 yd deep, 21 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 376 yd
Plays south-east. Dogleg right. 5 bunkers.
Green 34 yd deep, 21 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 454 yd
Plays south. 3 bunkers.
Green 26 yd deep, 21 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 154 yd
Plays south. 3 bunkers.
Green 22 yd deep, 24 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 460 yd
Plays west. Dogleg left. 5 bunkers and water.
Green 30 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 218 yd
Plays west. 1 bunker.
Green 22 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 293 yd
Plays east. 3 bunkers.
Green 22 yd deep, 15 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 203 yd
Plays north. 3 bunkers.
Green 36 yd deep, 19 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 445 yd
Plays north. 6 bunkers.
Green 30 yd deep, 17 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 320 yd
Plays south-east. 10 bunkers.
Green 25 yd deep, 17 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 203 yd
Plays west. 2 bunkers.
Green 31 yd deep, 24 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 400 yd
Plays south-east. Dogleg right. 4 bunkers.
Green 30 yd deep, 21 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 400 yd
Plays west. Dogleg left. 2 bunkers.
Green 26 yd deep, 20 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 503 yd
Plays west. 2 bunkers and water.
Green 23 yd deep, 22 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 269 yd
Plays north. 4 bunkers and water.
Green 22 yd deep, 16 yd wide. Falls 6% 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.