 SR 100 has a 0 @.@ 08 @-@ mile @-@ long ( 0 @.@ 13 km ) spur route that travels south from the SR 100 mainline to the boundary of Cape Disappointment State Park . The spur route was established in 1991 along with the main route and was originally 0 @.@ 61 miles ( 0 @.@ 98 km ) long until part of the highway was transferred to Pacific County on January 3 , 2006 . 
