Sammamish Heritage Society members Nan Gordon and Steve Thues will lead a walk through Pine Lake Park on May 17 and discuss local history and the geologic origins of the Plateau. The walk, from 10 a.m. to noon, will be along the gentle trails that skirt the lake, cross wetlands and cut through dense woods.

To sign up and view additional information, including trail maps, visit www.sammamishwalks.org.

Pine Lake Park is located at 228th Avenue Southeast and Southeast 24th Street.