OpenYardage
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In OpenStreetMap this club has more holes than a single round, or hands out numbers more than once. Which hole belongs to which course is not in the data: the holes carry no golf:course:name. Where that tag is present we separate the courses and show them one by one. Here all holes stand together, and whoever writes the book makes the choice. Tagging the holes in OpenStreetMap settles it for everyone.
Twin Base Golf Course is a golf course in the United States. 19 holes are surveyed here from OpenStreetMap, 6,772 yd6,193 m of playing length in total. No hole has a par on record. The longest hole is number 18 at 546 yd499 m, the shortest number 14 at 139 yd127 m. Worked out in advance: the distance to the front and the back edge of the green for 6 holes as well as the carry distance over 19 bunkers for 7 holes. For 19 holes the elevation change between tee and green is on record as well.
Yardage book for Twin Base Golf Course. Every hole is a drawing, and next to it the green with its distance rings, plus your own notes hole by hole and your club choice. Books by other players can be read, copied and printed as an A6 booklet. The button below opens the whole course, hole by hole.
SEE ALL 19 HOLESReading needs no account. Writing your own book does.
Never played with a yardage book? What goes in one and how to read it
Every hazard carries two numbers: the first reaches its near edge, the second carries past it. Drawn from OpenStreetMap, exactly as the app draws it.
| TAG | MISSING ON | WHAT FOR |
|---|---|---|
| par | 19 of 19 holes | Club choice and expectation |
| handicap | 19 of 19 holes | Stroke index, net scoring |
In OpenStreetMap this belongs on the individual hole, not on the course; anyone who plays here can add it there for everyone: edit in FairwayMapper · look at the course in OpenStreetMap · open the editor right away.
All figures in yards, converted from the metre values in OpenStreetMap.All figures in metres. The length follows the line of play from the back tee to the middle of the green and takes a dogleg with it. Carry distances count from the tee to the near edge and to the far edge of the hazard.
TABLE SCROLLS SIDEWAYS
| HOLE | LENGTH | GREEN FRONT · MIDDLE · BACK | GREEN DEPTH | GREEN WIDTH | ELEVATION | WALK TO NEXT HOLE |
|---|---|---|---|---|---|---|
| 1 OSM | 354 yd324 m | 339 · 353 · 367 yd310 · 323 · 336 m | 30 yd27 m | 25 yd23 m | -3 yd-3 m | 51 yd47 m |
| 2 OSM | 364 yd333 m | 349 · 364 · 378 yd319 · 333 · 346 m | 30 yd27 m | 24 yd22 m | -3 yd-3 m | 78 yd71 m |
| 3 OSM | 382 yd349 m | 365 · 377 · 395 yd334 · 345 · 361 m | 31 yd28 m | 27 yd25 m | -1 yd-1 m | 121 yd111 m |
| 4 OSM | 203 yd186 m | 191 · 209 · 223 yd175 · 191 · 204 m | 33 yd30 m | 27 yd25 m | -1 yd-1 m | 69 yd63 m |
| 5 OSM | 478 yd437 m | 466 · 477 · 491 yd426 · 436 · 449 m | 25 yd23 m | 23 yd21 m | -1 yd-1 m | 65 yd59 m |
| 6 OSM | 331 yd303 m | 316 · 330 · 346 yd289 · 302 · 316 m | 30 yd27 m | 25 yd23 m | +1 yd+1 m | 96 yd88 m |
| 7 OSM | 518 yd474 m | · | · | · | +1 yd+1 m | 78 yd71 m |
| 8 OSM | 182 yd166 m | · | · | · | +2 yd+2 m | 70 yd64 m |
| 9 OSM | 342 yd313 m | · | · | · | +2 yd+2 m | 152 yd139 m |
| 10 OSM | 432 yd395 m | · | · | · | -5 yd-5 m | 78 yd71 m |
| 11 OSM | 531 yd486 m | · | · | · | +2 yd+2 m | 116 yd106 m |
| 12 OSM | 344 yd315 m | · | · | · | -4 yd-4 m | 84 yd77 m |
| 13 OSM | 322 yd294 m | · | · | · | +1 yd+1 m | 69 yd63 m |
| 14 OSM | 139 yd127 m | · | · | · | 0 yd0 m | 72 yd66 m |
| 15 OSM | 441 yd403 m | · | · | · | +2 yd+2 m | 48 yd44 m |
| 16 OSM | 222 yd203 m | · | · | · | -1 yd0 m | 65 yd59 m |
| 17 OSM | 398 yd364 m | · | · | · | +2 yd+1 m | 103 yd94 m |
| 18 OSM | 546 yd499 m | · | · | · | +6 yd+5 m | · |
| 19 OSM 17 | 243 yd222 m | · | · | · | -1 yd-1 m | · |
| HOLES 1 TO 9 | 3,154 yd2,885 m | |||||
| HOLES 10 TO 18 | 3,375 yd3,086 m | |||||
| 19 HOLES | 6,772 yd6,193 m |
For 19 of the 19 holes the elevation profile is calculated. Hole 10 has the most cumulative elevation change along the played line: 7 yd (1 yd up, 6 yd down; -5 yd net tee to green).Hole 10 has the most cumulative elevation change along the played line: 7 m (1 m up, 6 m down; -5 m net tee to green). The basis are official elevation models (US-3DEP).
Two numbers to every hazard: the first reaches its near edge, the second carries past it. Land between the two and you are in it.
Bunker Red penalty area Water · yards from the teemetres from the tee · L left · R right
The basis is the map of this course in OpenStreetMap. Lengths, distances to the green edge and carry distances are calculated from it, not copied: every hole is projected onto its line of play and the arc length from the tee is counted. This replaces neither an official course measurement nor the club's scorecard. If you spot a mistake you can report it through the course page in the app, map it in FairwayMapper or correct it in OpenStreetMap straight away. Data as of 2026-10-07.
Do you know this course better than the map?
Ask a question, report a course that is missing, or say what should come next.
Do you work for Twin Base Golf Course?
The club material is still waiting on OpenStreetMap: 19 holes are drawn, not a full round of 9, 18, 27 or 36; the gap is listed above, under par. You know your course better than any stranger: in OpenStreetMap that is an hour of work.
edit in FairwayMapper · look at the course in OpenStreetMap · open the editor right away
As soon as it is there, the club material appears here: QR code, badge and the booklet to leave out.