Hole 1
Par 4 · 387 yd
Plays north. 2 bunkers.
Green 34 yd deep, 21 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Courses › England, United Kingdom
Golf course in Harpenden, England, United Kingdom
18 holes, par 71, about 5,402 yards (4,940 metres) along the hole lines. The par 3s are 3, 7, 14 and 17. The par 5s are 5, 8 and 16. The longest hole is the 5th at 431 yd, the shortest the 3rd at 126 yd. The map shows 73 bunkers. Water is in play on holes 10 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 · 387 yd
Plays north. 2 bunkers.
Green 34 yd deep, 21 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 255 yd
Plays south-east. Dogleg left. 3 bunkers.
Green 25 yd deep, 28 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 126 yd
Plays north-west. 4 bunkers.
Green 31 yd deep, 19 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 317 yd
Plays south-east. 4 bunkers.
Green 24 yd deep, 36 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 431 yd
Plays west. 8 bunkers.
Green 34 yd deep, 15 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 317 yd
Plays south-west. 5 bunkers.
Green 30 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 150 yd
Plays north-east. 5 bunkers.
Green 35 yd deep, 21 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 419 yd
Plays south-west. 5 bunkers.
Green 20 yd deep, 27 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 261 yd
Plays east. Dogleg right. 10 bunkers.
Green 27 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 331 yd
Plays south-east. Water.
Green 22 yd deep, 26 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 323 yd
Plays north-west. Dogleg right. 4 bunkers.
Green 24 yd deep, 27 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 427 yd
Plays north-east. 5 bunkers.
Green 26 yd deep, 21 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 327 yd
Plays south-west. Dogleg right. 2 bunkers.
Green 22 yd deep, 28 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 137 yd
Plays south-east. 2 bunkers.
Green 31 yd deep, 26 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 395 yd
Plays north-east. 2 bunkers.
Green 20 yd deep, 20 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 386 yd
Plays south-west. 6 bunkers.
Green 31 yd deep, 27 yd wide. Falls 6% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 137 yd
Plays west. 2 bunkers.
Green 27 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 277 yd
Plays north-west. 4 bunkers and water.
Green 28 yd deep, 28 yd wide. Falls 4% 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: Environment Agency LIDAR Composite DTM 1 m (Open Government Licence). Our maps are open data too. Number & Line isn't connected with the club.