http://www.jagersport.com/science_1.htm

http://www.palmbeachpost.com/sports/...rski_0816.html

Slalom Waterski Course Dimensions


Description Dimension Range
Total Length 849' 8 7/8" 847' 7 38" - 851' 10 3/8"
Starting Gate to Ball 1 88' 7" 88' 1 5/8" - 89' 1/4"
Ball 1 to Ball 2 Gates 134' 6 1/8" 133' 10 1/8" - 135' 2 1/4"
Center of Entrance Gate to Ball 1 96' 3 3/8" 95' 9 5/8" - 96' 9 1/8"
Ball 2 to Ball 3 Diagonal 154' 2 3/4" 153" 5 3/8" - 155' 1/8"
Entrance Gate, Center of Course to Ball 4- 4" 1 1/4" 3' 10 3/4" - 4' 3 3/4"
Center Line of Course to Turn Ball 37' 8 3/4" 37' 4 1/4" - 38' 1 3/8"
Center Line of Course to Boat Gates 3' 9 1/4" 3' 4 3/4" - 4' 1 3/4"
55 Meter Buoys 180' 5 3/8" 179' 6 1/2" - 181' 4 1/4"


At 34mph, a pro may reach 65mph. At 36, 68-70mph.