Check out the Dept. of Fish and Wildlife's website here:

http://fw.ky.gov/app1/Tournaments.aspx

You can pick your lake from the drop down box. That shows all tournaments scheduled with them, whether they are open, and generally have contact info.

There are more tournaments than that, a lot of tournaments don't schedule on their site. You can also call local tackle shops and see if they know of any, generally they will.