 The southern border of the Lake Morton-Berrydale CDP follows Covington Creek and Big Soos Creek, which flows west to the Green River.The namesake water body of Lake Morton is in the eastern part of the CDP, and the unincorporated community of Berrydale is in the northwest.Washington State Route 18 forms the northwest border of the CDP, and leads northeast to Interstate 90 near Snoqualmie and southwest to Auburn.