Hole 1 Genesis
Par 4 · 449 yd
Plays north. 6 bunkers.
Green 45 yd deep, 32 yd wide. Falls 6% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Mamaroneck, New York, USA
18 holes, par 71, about 7,432 yards (6,796 metres) along the hole lines. The par 3s are 3, 7, 10 and 13. The par 5s are 5, 9 and 12. The longest hole is the 12th at 632 yd, the shortest the 7th at 166 yd. The map shows 138 bunkers. It shows no water in play.
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 · 449 yd
Plays north. 6 bunkers.
Green 45 yd deep, 32 yd wide. Falls 6% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 470 yd
Plays north. 5 bunkers.
Green 42 yd deep, 33 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 247 yd
Plays north. 5 bunkers.
Green 39 yd deep, 26 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 469 yd
Plays north-west. 5 bunkers.
Green 36 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 514 yd
Plays south-east. 8 bunkers.
Green 37 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 326 yd
Plays north-west. 3 bunkers.
Green 34 yd deep, 28 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 166 yd
Plays south-east. 3 bunkers.
Green 31 yd deep, 22 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 490 yd
Plays south-east. Dogleg right. 5 bunkers.
Green 37 yd deep, 27 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 569 yd
Plays south. 12 bunkers.
Green 38 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 190 yd
Plays south-west. 3 bunkers.
Green 38 yd deep, 30 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 384 yd
Plays north. 9 bunkers.
Green 42 yd deep, 23 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 632 yd
Plays north. Dogleg left. 7 bunkers.
Green 38 yd deep, 24 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 220 yd
Plays south. 7 bunkers.
Green 42 yd deep, 26 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 456 yd
Plays north. Dogleg left. 7 bunkers.
Green 37 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 427 yd
Plays north. 3 bunkers.
Green 46 yd deep, 27 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 499 yd
Plays south. Dogleg left. 5 bunkers.
Green 39 yd deep, 22 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 469 yd
Plays south. Dogleg right. 13 bunkers.
Green 44 yd deep, 22 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 455 yd
Plays south. Dogleg left. 9 bunkers.
Green 47 yd deep, 31 yd wide. Falls 5% 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.