It is a rectangle with rounded corners and surrounded by walls approximately 1.22 metres (48 in) high called the boards.
Rink, a Scots word meaning 'course', was used as the name of a place where another game, curling, was played.
Early in its history, ice hockey was played mostly on rinks constructed for curling.
If an attacking player crosses the line into the other team's zone before the puck does, they are said to be offside.
Near each end of the rink, there is a thin red goal line spanning the width of the ice.
There are hash marks painted on the ice near the end zone faceoff spots.
The circles and hash marks show where players may legally position themselves during a faceoff or during in-game play.
The crease is a special area of the ice in front of each goal that is designed to allow the goaltender to perform without interference.
The entire area of the crease is typically coloured blue for easier visibility.
Under the rule, it is prohibited for the goaltender to handle the puck anywhere behind the goal line that is not within the trapezoidal area.
The motivation for the introduction of the trapezoid was to promote game flow and prolonged offensive attacks by making it more difficult for the goaltender to possess and clear the puck.
The ECHL, the only other developmental league in the Professional Hockey Players Association along with the AHL, also approved the rule for 2005–06.
[7] The referee's crease is a semicircle 10 feet (3.0 m) in radius in front of the scorekeepers bench.
The puck must now completely cross the blue line in the other direction to be considered in the neutral zone again.