- Welcome To Lake Shastina ocated 270 miles north of San Francisco in beautiful Siskiyou County, Lake Shastina is a water playground surrounded by beautiful homes and pristine lots. With a population of 1, 760, Lake Shastina is a thriving community with its own fully staffed water, police, and fire departments. Its panoramic beauty is home to many varieties of wildlife, flora and fauna. Dominating ...www.lakeshastina.com