Golf Out of Bounds Rules Explained — OB, Provisional Balls, Lost Balls

OB stands for "out of bounds." It refers to any area that is designated as outside the legal playing area of the golf course. OB is always marked by white stakes driven into the ground, white lines painted on the ground, or fences/walls on the course boundary. The penalty for hitting OB is stroke and distance: 1 extra stroke is added to your score, and you must replay the shot from the same spot where you hit the ball out of bounds. OB should not be confused with penalty areas (formerly called hazards), which are marked by yellow or red stakes and have different, less severe drop options.

The standard penalty for hitting out of bounds is stroke and distance — you add 1 stroke to your score and must replay from the same spot. If your first shot from the tee goes OB, your next shot will be your 3rd (stroke 1 = tee shot, stroke 2 = penalty, shot 3 = replay from tee). Some courses offer an optional local rule for a 2-stroke penalty with a forward drop near where the ball went OB, but this local rule must be posted by the course and is not valid in all competitive rounds. When in doubt, use stroke-and-distance and play a provisional before walking forward to look.

A provisional ball is a second ball you play before walking forward to look for a shot that might be out of bounds or lost. You must announce it verbally: "I am playing a provisional." If your original ball turns out to be OB or lost, the provisional ball becomes your ball in play — you count the original stroke, the penalty stroke, and the provisional stroke. If your original ball is found in bounds (even in a terrible lie), you must play the original and pick up the provisional. Playing a provisional saves time and keeps pace of play moving — you avoid the walk back to the tee if the ball is indeed OB.

Many recreational courses offer an optional local rule (approved by the USGA for non-competitive play) that lets you take a 2-stroke penalty and drop near where the ball went out of bounds, rather than returning to the original spot. Under this rule, you estimate where the ball crossed the OB line, then drop within two club-lengths of that point, not closer to the hole, keeping the flag between you and the drop point. The cost is 2 strokes (vs 1 for playing a provisional from the original spot), but you save time. This rule must be explicitly adopted by the course — look for it on the scorecard or on a sign at the first tee.

The Rules of Golf allow exactly 3 minutes to search for a lost ball, starting from the moment you or anyone in your group begins physically searching. After 3 minutes, the ball is officially lost under the rules, regardless of whether you can see it or are about to find it. A ball is "lost" if it cannot be found within 3 minutes, if you cannot identify it as your ball, or if you have already put another ball in play under a rule (like OB stroke-and-distance without a provisional). Playing a provisional ball before you search means you have a ball in play while you search — if you hit a provisional, search your 3 minutes, and the original is lost, play the provisional with no additional trip back.

White stakes mark the out-of-bounds boundary of a golf course. Any ball that lands completely outside the white stakes (or white painted line, where applicable) is out of bounds. Remember the color coding: white = out of bounds; yellow = yellow penalty area (old yellow hazard, usually water); red = red penalty area (old red hazard, often lateral water or marshy ground); blue or orange stakes are sometimes used by individual courses for local rules or ground under repair (check the course's local rules card). When you see white stakes, you need to aim well clear of them — even a small clip can send a ball OB.

Stroke and distance is the name of the penalty procedure used for out-of-bounds shots and genuinely lost balls. The two components: (1) "Stroke" — you add one penalty stroke to your score. (2) "Distance" — you return to the spot where you previously played and play again from there (you lose the distance your ball traveled). Combined, you are effectively penalized by one shot and the full distance of the shot. For example: tee shot goes OB = you add 1 stroke and hit again from the tee. Your second tee shot is actually your 3rd shot (1 tee shot + 1 penalty + 1 re-hit from tee). Stroke-and-distance is the most common area where beginners accidentally miscount their score.

The penalties are the same (stroke and distance), but they are different situations. Out of bounds means your ball crossed a white stake/line boundary and left the defined playing area — you can often see exactly where the ball landed, it is just outside the course. A lost ball means you cannot find your ball within 3 minutes in the playing area — you cannot see it or cannot confirm it is yours. In both cases: 1 penalty stroke + replay from original spot. A practical difference: if you know your ball is OB, you know to play a provisional immediately. If you think your ball might be in the rough (not lost), you still might want a provisional if there is any doubt. When in doubt, play a provisional.