Out of Bounds
Out of bounds (OB) is any area outside the boundary edge of a golf course, as set by the Committee. A ball is out of bounds only when all of it lies beyond that boundary line.
What is out of bounds in golf?
Every golf course has a defined perimeter, and the area beyond that perimeter is treated as off the course. White stakes, white lines, fences, walls, and hedges are the most common ways courses mark where in bounds ends and out of bounds begins.
When a ball comes to rest in this area, it cannot be played from where it lies. Under Rule 18.2 of the Rules of Golf, the player adds one penalty stroke and replays the shot from the spot of the previous one. This combined loss of a stroke and the yardage from the original shot is known as stroke-and-distance, and it is considered one of the most punitive outcomes for a single shot under the Rules of Golf.
Out of bounds also includes any area inside the course that the Committee specifically designates as off-limits, such as a practice range, an adjacent hole, or a maintenance area. These areas are called internal out of bounds.
How out of bounds is marked
The Rules of Golf give the Committee freedom to define the boundary edge in several ways, and a single course will often use more than one method on different holes.
The most common markers are:
- White stakes placed at intervals along the boundary, with the OB line running from stake to stake along the course-side edges at ground level.
- White painted lines, usually used where stakes would be impractical or where a precise edge is needed.
- Fences, walls, and railings that form a hard, permanent boundary.
- Hedges or other natural features that the Committee designates as the boundary edge.
White is the standard color associated with out of bounds, distinguishing it from the red and yellow used for penalty areas. The back of the scorecard or local rules sheet usually lists any internal out of bounds that apply to specific holes.
One detail that trips up plenty of golfers: where a line takes precedence over stakes. If a course uses both stakes and a painted line, the line is the boundary. The stakes are just visual aids in that case.
When is a ball out of bounds?
A ball is out of bounds only when every part of it lies beyond the boundary edge. If any sliver of the ball touches the course-side edge of the line, or the inside of the stakes at ground level, the ball is still in play.
The exact rule depends on how the boundary is marked:
- White stakes: the boundary edge is the line joining the course-side points of the stakes at ground level. The stakes themselves are out of bounds. A ball touching a stake is out of bounds.
- White painted lines: the line itself is out of bounds. A ball partially on the course-side edge of the line is in play. A ball fully on the line or beyond it is out.
- Fences and walls: the boundary edge is the course-side edge of the fence or wall at ground level.
The boundary also extends both above and below the ground. The R&A definition states that anything inside the boundary edge is in bounds, whether on, above, or below the surface. So a tree trunk standing outside the boundary with branches reaching back into the course is partly out and partly in, depending on which part of the tree the ball touches.
A player may also stand out of bounds to play a ball that is in bounds. Position of the player has no bearing on the status of the ball.
Out of bounds vs penalty area
The two are often confused because both involve trouble and both carry penalties, but they are governed by different rules and offer different relief options.
| Feature | Out of bounds | Penalty area |
|---|---|---|
| Marker color | White stakes or white lines | Red or yellow stakes or lines |
| Governing rule | Rule 18 | Rule 17 |
| Penalty | One stroke plus loss of distance | One stroke |
| Drop allowed? | No, stroke-and-distance only | Yes, several relief options |
| Markers movable? | No, boundary objects are fixed | Yes, stakes can be moved if they interfere |
A penalty area, formerly called a hazard, is part of the course. Out of bounds is not. That distinction drives every other difference between the two.
What happens when a ball goes out of bounds
Under Rule 18.2, the only standard relief for an OB ball is stroke and distance: add one penalty stroke and play again from the spot of the previous shot. There is no option to drop near where the ball crossed the boundary, the way there is with a penalty area.
If a player suspects a ball might be out of bounds, they can announce and play a provisional ball under Rule 18.3 before walking forward to check. A provisional saves the walk back to the previous spot if the original turns out to be OB or lost. If the original is found in bounds, the provisional is abandoned.
There is also an optional Local Rule called Model Local Rule E-5, introduced in 2019, which gives clubs and casual players an alternative to stroke-and-distance relief. Under E-5, a player takes two penalty strokes and drops near the spot where the ball is estimated to have gone out, finding the nearest fairway edge no closer to the hole. According to the USGA, this rule is recommended for casual play and is not appropriate for professional or elite amateur competitions.
The rule for searching for a lost ball is three minutes from the moment the player begins to look. If a ball cannot be found within that window and is not known to be in a penalty area, it is treated the same as an OB ball.
Related Golf Terms
- Open stance — A stance where the front foot is farther from the target line than the back foot.
- Nuked — Hit a shot with maximum power and distance.
- Open clubface — When the clubface points right of the target at impact for a right-hander.
- Ostrich — A score of five under par on a single hole (virtually impossible, theoretical).
- Offset — A club design where the leading edge of the face is set behind the hosel.
Frequently Asked Questions
Can a player move a white stake out of the way?
No. White stakes are classified as boundary objects under the Rules of Golf, which means they are fixed and cannot be moved, bent, or removed. Doing so is a two-stroke penalty under Rule 8.1a for improving conditions affecting a stroke, although the penalty can be avoided by restoring the stake to its original position before the next shot.
What does OB mean in golf?
OB is shorthand for out of bounds. Some players also write it as O.B. or O.O.B. Spoken aloud, it is usually pronounced as “oh-bee.”
Is a ball touching the line out of bounds?
For a white painted line, yes. The line itself is part of the out of bounds area, so a ball resting on the line is out. The ball is in play only if at least part of it sits on the course-side edge of the line.
Does out of bounds extend above and below ground?
Yes. According to the R&A definition, the boundary edge of the course extends straight up into the air and straight down into the ground.
Can a player stand out of bounds to play a ball that is in bounds?
Yes. Only the position of the ball matters. A player may stand wherever necessary, including outside the boundary, to make a stroke.
Sources
- USGA and R&A. “Rule 18: Stroke-and-Distance Relief; Ball Lost or Out of Bounds; Provisional Ball.” Rules of Golf, effective 2023. Accessed May 2026.
- USGA. “Out of Bounds/Lost Ball/Provisional.” Rules Hub. Accessed May 2026.
- R&A. “Definition of Out of Bounds.” Rules of Golf. Accessed May 2026.
- USGA. “Model Local Rule E-5: Alternative to Stroke and Distance for Lost Ball or Ball Out of Bounds.” Committee Procedures, Section 8E. Accessed May 2026.
- Steve Carroll. “What is out of bounds in golf?” National Club Golfer, updated September 2024.
- PGA of America. “How to Take Relief From Hazards, Out of Bounds and Lost Balls.” Accessed May 2026.
- Golf Digest. “Rules of Golf Review: Can I move an OB stake?” March 2024.
