Judith Kyrinis and Terrill Samuel both shot a 3-under 68 to share the lead at both the Canadian Women's Senior and Mid-Amateur Championship.
Strathroy's Jane Hedges-Mckinnon opened with a 6-over an sits 18th, while Sarnia's Cherie Armstrong finished the first round with an 11-over 82.
Second round action gets underway from the Sawmill Creek Golf Resort and Spa at 7:30am. Armstrong begins her day at 8:14am, Hedges-McKinnon has 9:53am tee off.