The Suffolk Times. North Fork Polar Bears to host ‘Splash for CAST’ in East Marion - At 10 a.m. Sunday, Jan. 29, at Truman’s Beach in East Marion, the North Fork Polar Bears and anyone wanting to join them will plunge into the chilly winter water — no matter the weather — all for a good cause. “For a lot of members, including myself, this started as a pandemic activity,” said North Fork Polar Bears member Meg McGinnis. “In the past year, our group has grown so much, both in numbers and as a tight-knit community. For this reason, we wanted to do something to give back to our larger North Fork community.”