 Delaware Route 1A ( DE 1A ) is a state highway in Sussex County . The route runs 2 @.@ 92 mi ( 4 @.@ 70 km ) from DE 1 in Dewey Beach to another intersection with DE 1 west of Rehoboth Beach . The route provides access to Rehoboth Beach from DE 1 , heading north before turning to the west . DE 1A follows King Charles Avenue , Bayard Avenue , 2nd Street ( southbound ) , Christian Street ( northbound ) , and Rehoboth Avenue . 
