Wash. Rev. Code § 47.17.480
A state highway to be known as state route number 261 is established as follows: Beginning at a junction with state route number 12 at Delaney, thence northwesterly to a junction with state route number 260 in the vicinity of McAdam; also Beginning at a junction with state route number 26 at Washtucna, thence northerly to a junction with state route number 90 at Ritzville.
[ 1987 c 199 s 21; 1971 ex.s. c 73 s 12; 1970 ex.s. c 51 s 97.]