FYI from fourmilelake.ca
The hours of operation and access is posted on the signs at the public beach, and governed by By-Law 95-20 as amended:
"Boats may only be launched or landed as follows: Beginning the Friday before July 1st holiday between 7-9am and 6-9:30pm. Beginning August 1st to the Friday before Labour Day, between 7-9am and 12 to 1:30pm and 6-9:30pm"