 Until 1914 and completion of the Red Brick Road (now Bothell Way, part of State Route 522) to nearby Kenmore and Bothell, it also marked the literal end of improved roads heading north from Seattle, with the best access to points further north and east being by boat across Lake Washington or the Seattle, Lake Shore and Eastern Railway.Lake Forest Park officially incorporated on June 20, 1961, in large part to help maintain its specific identity.The town remained small - under 5,000 in population - until the 1990s, when a series of annexations expanded city borders significantly and more than doubled the official population.