Wash. Rev. Code § 47.17.310
A state highway to be known as state route number 161 is established as follows: Beginning at a junction with state route number 7 in the vicinity of La Grande, thence northeasterly via Eatonville to Puyallup, thence northerly to a junction with state route number 18. That portion of state route 161 within King county shall be designated Enchanted Parkway.
[ 1987 c 520 s 1; 1971 ex.s. c 73 s 6; 1970 ex.s. c 51 s 63.]