State Route 11 starts at I-5 Exit 231 at the north end of Burlington, follows Chuckanut Drive to the Fairhaven district in southern Bellingham, and heads east to terminate at I-5 Exit 250. The Burlington to Fairhaven portion of SR 11 was US 99 until the mid 1930s and Alt US 99 into the 1950s. This route was also designated as the Chuckanut Drive branch of PSH 1 before 1964. Today SR 11 is 21.28 miles long.
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