when was it opened?
1930s
Washington State Route 544
 It was paved by the Whatcom County government in the 1930s
where is washington state route 544 situated? Northern Whatcom County, Washington, United State which places does it connects? SR 539 near Lynden to Everson and a junction with SR 9 in Nooksack
wiki:16435599
Washington State Route 544 [SEP] Introduction
State Route 544 is a state highway in northern Whatcom County, Washington, United States. It runs east–west for near the Canadian border, connecting SR 539 near Lynden to Everson and a junction with SR 9 in Nooksack. The Lynden–Everson highway was built in the 1880s as a wagon road, with onward connections to Nooksack via a ferry over the Nooksack River that was later replaced with a bridge. It was paved by the Whatcom County government in the 1930s and incorporated into the state highway system in 1951 as a branch of Secondary State Highway 1A. During the 1964 state highway renumbering, the branch became SR 544.