Lake Ontario Offshore Racing Committee Proceeding with the 31st Lake Ontario 300/600 Challenge Race on Saturday, July 10th, 2021 We are excited to announce that we remain “Go” for the start of the 2021 Lake Ontario Racing Season on July 10 th and look forward to a great race. The Lake Ontario 300/600 Challenge Race (LO300/LO600) is a 300NM and 600 NM sailboat race on Lake Ontario. The race is open to single-handed, double-handed, fully crewed keelboat and multihull sailboats.