It depends, a couple of years ago it was a big concern because a round time approached five and half hours. A round on the PGA Tour would easily last five hours and perhaps even longer. The problem is now nearly all the par 5's are reachable in 2 so you need to wait for the green to clear and some par 4's are now drivable so again you'll need to wait for the green to clear, and also if the group in front of you is going for the green you'll be waiting on the tee for them.
Usually around 5-5 1/2 hours but can sometimes be as long as 6 hours.
The average game of Golf would take between 4 and 5 hours, but it all depends on the quality of the players, how slow they are and the speed of the players in front of them.
In 2009 it was 7,251 yards.
The Nationwide Tour would be the tour before the PGA Tour, the top 25 on the Nationwide tour at the end of the season win PGA Tour cards.
PGA Tour on ABC was created in 1966.
PGA Tour on CBS was created in 1956.
The PGA Tour is associated with the sport of golf.
PGA Tour on USA was created in 1982.
PGA Tour of Australasia was created in 1973.
Tiger Woods PGA Tour was created in 2003.
PGA Tour Network was created on 2005-06-09.
Professional Golfers Association of America started in 1916.
Tiger Woods' career earning on the PGA Tour is $87,832,539. (Source PGA Tour website)
The results from the PGA Tour can be viewed at the official website of the PGA Tour. They are also sometimes published on golf fansites, as well as the ESPN website.
Follow the link below for detailed information about the PGA Tour.