On August 1, Washington state held special primary elections for eight different legislative seats. Here is a link to the Secretary of State’s election returns. The only races with any minor party candidates were the races for State Senate 48, and State Representative 48-1. Libertarians ran in both elections. With no Republicans running in those districts, the Libertarians did well: Michelle Darnell polled 23.66% for State Senate; Ciaran Dougherty polled 23.4% for Representative.
None of the eight seats are being filled by the August 1 election. These are only primaries, with the election itself set for November 7, 2017, in all eight races.