Located along the Ohio-Pennsylvania borderline in West Middlesex, Pennsylvania is one of the best-kept golf secrets in the country - Oak Tree Golf Club. This course sits between Pittsburgh and Cleveland, and it has earned a reputation in both cities for the high-quality golf experience it offers. Â Players from throughout the region, and even the country, making a trip to Oak Tree, which is part of the "Mercer County Golf Trail of Western Pennsylvania." Oak Tree is also a major part of the reason that this area earned Golf Digest's rating as one of the "Top 10 Best Golf Towns in the USA."