Golf course

A golf course consists of a series of holes, each consisting of a teeing ground, fairway, rough and other hazards, and a green with a flagstick (pin) and cup, all designed for the game of golf. A standard round of golf consists of playing 18 holes, thus most golf courses have this number of holes. Some, however, only have nine holes and the course is played twice per round, while others have 27 or 36 and choose two groups of nine holes at a time for novelty and maintenance reasons. Additionally, par-3 courses also exist, consisting of nine or 18 holes, all of which are a Par 3. Many older golf courses, often coastal, are golf links, of a different style to others. For non-municipal courses, there is usually a golf club based at each course, and may include a pro shop.

Teeing area

The first section of every hole consists of what is known as the teeing ground, or tee-box. There is usually more than one available box for a player to place their ball, each one a different distance from the hole. They are generally as level as feasible, and most are slightly raised from the surrounding fairway. The most common tee areas, in increasing order of length from the hole, are the ladies' tee, the men's tee, and the championship tee. Other common tee-boxes include the junior tee, closer to the hole than the ladies' tee, and the senior tee, generally between the ladies' tee and the men's tee. In tournaments, golfers generally tee off from the box one level further from the "normal" box for their class (men use the championship tee, ladies use the senior or men's tee, and juniors use the ladies' tee).

Each tee box has two markers showing the bounds of the legal tee area. The teeing area spans the distance between the markers, and extends from two-club lengths behind the markers up to the markers themselves. A golfer may play the ball from outside the teeing area, but the ball itself must be shot from within the area.

After the first shot from the tee (teeing off), the player hits the ball from where it came to rest toward the green. The area between the tee box and the putting green where the grass is cut even and short is called the fairway and is generally the most advantageous area from which to hit. The area between the fairway and the out-of-bounds markers and also between the fairway and green is the rough, the grass of which is cut higher than that of the fairway and is generally a disadvantageous area from which to hit. On par three holes the player is expected to be able to drive the ball to the green on the first shot from the tee box. On holes longer than par threes players are expected to require at least one extra shot made from the fairway or rough.

While many holes are designed with a direct line-of-sight from the tee-off point to the green, some holes may bend either to the left or to the right. This is called a "dogleg", in reference to a dog's knee. The hole is called a "dogleg left" if the hole angles leftwards, and a "dogleg right" if the hole angles rightwards. Sometimes, a hole's direction can bend twice, and is called a "double dogleg".

Just as there are good quality grasses for putting greens, there are good quality grasses for the fairway and rough. The quality of grass influences the roll of the ball as well as the ability of the player to 'take a divot' (effectively, the ability to hit the ball into the turf and compress it). 

Hazards

Many holes include hazards, which may be of three types: (1) water hazards such as lakes and rivers; (2) man-made hazards such as bunkers; and (3) natural hazards such as dense vegetation. Special rules apply to playing balls that fall in a hazard. For example, a player may not touch the ground with his club before playing a ball, not even for a practice swing. A ball in any hazard may be played as it lies without penalty. If it cannot be played from the hazard, the ball may be hit from another location, generally with a penalty of one stroke. The Rules of Golf govern exactly from where the ball may be played outside a hazard. Bunkers (or sand traps) are shallow pits filled with sand and generally incorporating a raised lip or barrier, from which the ball is more difficult to play than from grass. As in any hazard, a ball in a sand trap must be played without previously touching the sand with the club.

Putting green

To putt is to play a stroke on the defined putting surface. Usually, this stroke is played on the green with a putter where the ball does not leave the ground. Once on the green, the ball is putted (struck with the eponymous flat-faced club to roll it along the ground) toward the hole until the ball falls into the cup.

The grass of the putting green (more commonly just green) is cut very short so that a ball can roll long distances. The most common types of greens for cold winter, but warmer (not extremely warm i.e. Southern United States) are bent grass greens. These are considered the best greens because of their ability to be cut to extremely low heights, and their ability to be grown from seed. Bent grass does not have grain, which makes it superior as a putting surface; however, bent grass often gets infested with poa annua, which is a costly and time consuming weed. Augusta National is one of many golf courses to use these types of greens; the original design of Augusta National did not have bent grass greens, however, in the 1980s, the controversial decision was made that changed the greens to bent grass, from Bermuda. This has affected the speed and playing of Augusta National. Many putting greens nowadays have made the decision to change to Bermuda Greens. Most Golf courses made the decision to change when they saw how much business the other courses were bringing in.Another type of grass common for greens is TifDwarf Hybrid Bermuda (other variants exist, but TifDwarf is one of the most common), or simply Bermuda grass. This type of grass is more common in places that do not have cold winters, yet have very warm summers (such as the southern portion of the United States, and the southwestern states). A green is generally established from sod which has had the soil washed off of it as to avoid soil compatibility problems and then laid tightly over the green, rolled and topdressed with fine sand. Another common and more economical approach for establishing a putting green is hybrid Bermuda spriggs, which are the stolon of the grass which are raked out at the sod farm and laid out on the green to establish. The best greens are always established vegetatively and never from seed.

A downside to Bermuda greens is the cost of maintenance, and the existence of grain (the growth direction of the blades of grass affects the ball's roll and is called the grain of the green). The slope or break of the green also affects the roll of the ball. The cup is always found within the green and must have a diameter of 108 millimeters (4.25 in) and a depth of at least 10 centimeters (3.94 in). Its position on the green is not fixed and is normally changed daily by a greenskeeper in order to prevent excessive wear and damage to the turf. 

Other areas

Some areas of the course are designated as ground under repair ("G.U.R."), where greenskeepers are making repairs or where the course is damaged. A ball coming to rest in this spot may be lifted, then played from outside the G.U.R. without penalty. Certain man-made objects on the course are defined as obstructions (i.e. distance posts, gardens, etc.), and specific rules determine how a golfer may proceed when their play is impeded by these.

Driving range

Often, there is a practice range or driving range, usually with practice greens, bunkers, and driving areas. Markers showing distances are usually included on a practice range to benefit the golfer. There may even be a practice course (often shorter and easier to play than full-scale golf courses), where golfers practice to measure how far they can hit with a specific club or to improve their swing technique.

Design

A specialty of landscape design or landscape architecture, golf course architecture is its own field of study. Some golf course architects become celebrities in their own right. The field is represented by the American Society of Golf Course Architects, the European Institute of Golf Course Architects and the Society of Australian Golf Course Architects.

While golf courses often follow the original landscape, some modification is unavoidable. This is increasingly the case as new courses are more likely to be sited on less optimal land. Bunkers and sand traps are almost always artificial, although other hazards may be natural.

The layout of fairways follows certain traditional principles, such as the number of holes (nine and 18 being most common), their par and number of chosen par types per course. It is also preferable to arrange greens to be close to the tee box of the next playable hole, to minimize travel distance while playing. Combined with the need to package all the fairways in a compact square or rectangular land plot, they tend to form an oppositional tiling pattern. In complex areas, sometimes two holes share a single tee box. It is also common for separate tee-off points to be positioned for men, women, and amateurs, each one respectively lying closer to the green.

A successful design is as visually pleasing as it is playable. With golf being an outdoor form of recreation, the strong designer is an adept student of natural landscaping, understanding the aesthetic cohesion of vegetation, water bodies, paths, grasses, stonework and woodwork, among other things.

Executive golf course

A special design of golf course is the "executive" golf course (also known as a "par-3" course). This course differs from standard courses in that the majority of holes are Par 3 holes, with one or two Par 4 holes added and sometimes (though rare) a Par 5 hole. The executive course is designed for beginner or older golfers and those who lack the time to play a round on a standard course.