The Supertest Ladies Open was a golf

Golf

Golf is a precision club and ball sport, in which competing players use many types of clubs to hit balls into a series of holes on a golf course using the fewest number of strokes....

 tournament on the LPGA Tour from 1966 to 1969. It was played in Ontario

Ontario

Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 at the Sunningdale Golf Club in London

London, Ontario

London is a city in Southwestern Ontario, Canada, situated along the Quebec City – Windsor Corridor. The city has a population of 352,395, and the metropolitan area has a population of 457,720, according to the 2006 Canadian census; the metro population in 2009 was estimated at 489,274. The city...

 from 1966 to 1967 and at the Bayview Golf & Country Club in Thornhill

Thornhill, Ontario

Thornhill is a community in the Greater Toronto Area of Southern Ontario, Canada, located on the northern border of the city of Toronto. Once a municipal village, Thornhill is now a community and postal designation geographically split into two municipalities along Yonge Street, the city of...

 from 1968 to 1969. It was the first LPGA Tour event to be played in Canada. The title sponsor was Supertest Petroleum, a Canadian petroleum company.

Winners

Ladies' Supertest Open

• 1969 Sandra Haynie
  Sandra Haynie
  Sandra Jane Haynie is an American professional golfer.Haynie was born in Fort Worth, Texas. She won 42 events on the LPGA Tour, including four major championships. She finished in the top ten on the money list every year from 1963 and 1975 and a 14th and final time in 1982, her best placing being...
  
  

Supertest Canadian Open

• 1968 Carol Mann
  Carol Mann
  Carol Mann is an American professional golfer.Mann was born in Buffalo, New York and grew up in Baltimore, Maryland After attending the University of North Carolina at Greensboro, Mann joined the LPGA Tour in 1961. She won 38 tournaments on the tour, including two major championships, the 1964...
  
  

Supertest Ladies' Open

• 1967 Carol Mann
  Carol Mann
  Carol Mann is an American professional golfer.Mann was born in Buffalo, New York and grew up in Baltimore, Maryland After attending the University of North Carolina at Greensboro, Mann joined the LPGA Tour in 1961. She won 38 tournaments on the tour, including two major championships, the 1964...
  
  

Supertest Ladies Open

• 1966 Kathy Whitworth
  Kathy Whitworth
  Kathy Whitworth is an American professional golfer. Throughout her playing career she won 88 LPGA Tour tournaments, more than anyone else has won on either the LPGA Tour or the PGA Tour. In 1981 she became the first woman to reach career earnings of $1 million on the LPGA Tour...