Highest Slope Rating
Hardest Golf Courses in Ontario, New York
The 12 most challenging golf courses in Ontario, New York, ranked by maximum slope rating. Tee-by-tee yardage, slope, and course rating for every course.
Ranked list of hardest golf courses in Ontario
Ontario Golf Course Rankings FAQ
What is the hardest golf course in Ontario, New York?
Cobblestone Creek Country Club in Victor is currently the hardest golf course in Ontario based on slope (slope rating 152).
How many ranked golf courses are in Ontario, New York?
20 golf courses in Ontario are catalogued in Stymie's directory. This ranking page shows the top 12 by slope.
How are the rankings calculated?
Rankings use the USGA slope rating from each course's most difficult tee set. Slope measures relative difficulty for a bogey golfer versus a scratch golfer, on a scale from 55 (easiest) to 155 (most challenging). A slope of 113 is average.
Can I book a tee time at these Ontario courses?
Yes. Each course name links to its Stymie page with scorecard, reviews, architect info, and booking options. Set a tee time alert to be notified when availability opens.