Trap or hazard
Ask Dustin Johnson
Hazard is the area of sand or water between the tee and the hole.
Yellow is a water hazard. Red is a lateral hazard. White is out of bounds. The rules indicate how each of these should be dealt with.
Water hazard - yellow stakes, lateral hazard - red stakes and bunkers.
The risk for a hazard before controls are put in place
Blue stakes on a golf course indicate "ground under repair". They may be blue with a green top which would indicate that an appropriate government agency has declared the area an "environmentally-sensitive area" and the local golf committee has declared it ground under repair to prevent play from it.
It is the total number of golf club strokes, that a specific course was designed to be played in for 18 holes.
you can go play it. It is in a hazard tho and hazard rules apply
Yes, you are allowed to pull these out of the ground. But you can not pull OB stakes out of the ground.
A bunker or sand trap
This marks the boundary of a water hazard.