Hole 1
Par 4 · 408 yd
Plays south. 2 bunkers and water.
Green 27 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Niwot, Colorado, USA
18 holes, par 70, about 6,628 yards (6,061 metres) along the hole lines. The par 3s are 5, 7, 12 and 16. The par 5s are 9 and 11. The longest hole is the 11th at 581 yd, the shortest the 16th at 157 yd. The map shows 50 bunkers. Water is in play on holes 1, 8, 11 and 13.
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 · 408 yd
Plays south. 2 bunkers and water.
Green 27 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 418 yd
Plays south. Dogleg left. 3 bunkers.
Green 25 yd deep, 33 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 447 yd
Plays north-west. 1 bunker.
Green 21 yd deep, 33 yd wide. Falls 6% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 295 yd
Plays west. 4 bunkers.
Green 31 yd deep, 22 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 194 yd
Plays north-east. 4 bunkers.
Green 25 yd deep, 19 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 409 yd
Plays north. Dogleg right. 4 bunkers.
Green 27 yd deep, 24 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 237 yd
Plays north-east. 2 bunkers.
Green 34 yd deep, 26 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 429 yd
Plays south. 1 bunker and water.
Green 32 yd deep, 25 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 528 yd
Plays north-east. Dogleg left. 2 bunkers.
Green 27 yd deep, 26 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 386 yd
Plays south-east. 4 bunkers.
Green 30 yd deep, 20 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 581 yd
Plays south. 3 bunkers and water.
Green 37 yd deep, 26 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 213 yd
Plays north. 2 bunkers.
Green 31 yd deep, 28 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 419 yd
Plays north. 2 bunkers and water.
Green 33 yd deep, 24 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 382 yd
Plays south-west. Dogleg left. 4 bunkers.
Green 38 yd deep, 27 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 389 yd
Plays south. 3 bunkers.
Green 32 yd deep, 26 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 157 yd
Plays north-west. 1 bunker.
Green 31 yd deep, 28 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 387 yd
Plays north. 6 bunkers.
Green 31 yd deep, 24 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 349 yd
Plays north. 3 bunkers.
Green 25 yd deep, 32 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: USGS 3D Elevation Program 1 m DEM (public domain). Our maps are open data too. Number & Line isn't connected with the club.