Out of Bounds
Also known as: OB
Out of bounds (OB) is the area outside the course's legal playing boundary, usually marked by white stakes or a fence line — hitting a ball there costs stroke and distance, meaning the golfer replays the shot from the original spot plus a one-stroke penalty.
Out of bounds marks the outer limit of the golf course, most commonly identified by white stakes, a white line painted on the ground, or sometimes a fence or other boundary object defined in the local rules for that course. Unlike hazards on the course itself, out of bounds represents leaving the property entirely — the ball is no longer in a playable area at all, no matter how it might be lying.
The penalty for hitting out of bounds is stroke and distance: the golfer must return to the spot of the previous shot and replay it, adding one penalty stroke on top of the shot that went out of bounds and any prior strokes. This is the most costly common penalty in golf specifically because it erases all forward progress — a tee shot hit out of bounds means the golfer is now hitting their third shot from the tee (the original stroke, the penalty stroke, and now the replayed shot), rather than simply taking relief nearby the way many other penalties allow.
Because a ball reaching a whereabouts near the boundary line is a judgment call about which side of the line it actually crossed, disputes are usually resolved by checking exactly where the ball first crossed the boundary plane (extending vertically upward from the boundary line or stakes), not by where it eventually came to rest — a ball that crosses out of bounds and bounces back into the course is still out of bounds, since the determining moment is the crossing, not the final position.
Example
A player's slice carries just past the white stakes lining the right side of the hole; even though the ball bounces back onto the fairway, it is ruled out of bounds because it crossed the boundary plane, and the shot must be replayed with a one-stroke penalty.
Why it matters
Out of bounds carries the most costly common penalty in golf — stroke and distance — which is why understanding the boundary and playing a provisional ball whenever there's doubt saves both strokes and time.
Common mistakes
- Assuming a ball that bounces back onto the course after crossing the boundary line is still in play — the determining factor is where the ball first crossed the boundary, not where it ends up.
- Not playing a provisional ball when a shot might be out of bounds, resulting in a long walk back if it turns out to be OB.
- Confusing out of bounds with a penalty area, which carries a different, less costly relief option than the stroke-and-distance penalty for OB.
Frequently asked questions
What is the penalty for hitting out of bounds?
Stroke and distance — the golfer replays the shot from the original spot and adds one penalty stroke, meaning all forward progress from that shot is lost.
How is out of bounds different from a penalty area?
Out of bounds means the ball has left the course boundary entirely and carries the more costly stroke-and-distance penalty, while a penalty area (like a water hazard) is still part of the course and offers relief options closer to where the ball entered.
Related terms
- Lost BallA ball is officially lost if it isn't found within three minutes of the group beginning to search for it — once that window closes, the golfer must take stroke-and-distance relief, replaying the shot from its original spot plus a one-stroke penalty.
- Penalty Area (Water Hazard)A penalty area — commonly a pond, stream, or marked rough — is defined by yellow or red stakes/lines and offers relief options (one penalty stroke) that are meaningfully more forgiving than out of bounds, since the ball never technically left the course.
- Local RuleA local rule is a course- or competition-specific modification adopted by the committee running play — commonly covering embedded balls, temporary conditions like winter rules, or unique course features not addressed by the standard Rules of Golf.
- Drop ProcedureThe modern drop procedure requires releasing the ball from knee height, straight down, within the defined relief area — a simpler process than the older shoulder-height drop, but one still commonly done incorrectly.
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