Hole 1
Par 4 · 393 yd
Plays north. Dogleg left. 1 bunker.
Green 28 yd deep, 33 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Castro Valley, California, USA
18 holes, par 71, about 5,731 yards (5,240 metres) along the hole lines. The par 3s are 3, 5, 7, 13 and 16. The par 5s are 4, 9, 12 and 18. The longest hole is the 9th at 504 yd, the shortest the 13th at 128 yd. The map shows 18 bunkers. Water is in play on holes 12 and 14.
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 · 393 yd
Plays north. Dogleg left. 1 bunker.
Green 28 yd deep, 33 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 362 yd
Plays north. Dogleg right. 2 bunkers.
Green 31 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 129 yd
Plays north-east. 2 bunkers.
Green 28 yd deep, 24 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 464 yd
Plays north-east.
Green 27 yd deep, 22 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 153 yd
Plays south. 1 bunker.
Green 32 yd deep, 25 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 358 yd
Plays south-west. 1 bunker.
Green 30 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 170 yd
Plays south. 2 bunkers.
Green 33 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 314 yd
Plays south. 1 bunker.
Green 26 yd deep, 28 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 504 yd
Plays south. Dogleg right. 2 bunkers.
Green 30 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 352 yd
Plays west. 2 bunkers.
Green 34 yd deep, 31 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 270 yd
Plays north-west. Dogleg left. 1 bunker.
Green 32 yd deep, 28 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 481 yd
Plays north-west. 2 bunkers and water.
Green 28 yd deep, 31 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 128 yd
Plays north-west. 1 bunker.
Green 28 yd deep, 26 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 313 yd
Plays south-east. Dogleg left. 2 bunkers and water.
Green 34 yd deep, 27 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 324 yd
Plays south-east. Dogleg right. 1 bunker.
Green 27 yd deep, 25 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 182 yd
Plays south.
Green 26 yd deep, 20 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 359 yd
Plays north. 1 bunker.
Green 21 yd deep, 23 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 479 yd
Plays south-east. Dogleg left. 1 bunker.
Green 32 yd deep, 30 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.