The Snoqualmie Valley and nearby areas boast many great fishing spots, such as the Snoqualmie River. Several small area lakes like Lake Tye in Monroe, Lake Langlois in Carnation and Cottage Lake in Woodinville are also great choices for families and are stocked with trout and large mouth bass each year.
Fishing licenses are required in Washington and can be purchased online or at Duvall Ace Hardware and Garden. Free Fishing Weekend in Washington is always the first weekend after the first Monday in June.
WA State Dept of Fish & Wildlife for rules and online license purchase: https://wdfw.wa.gov/fishing
See comprehansive look at Fishing Spots in Duvall
And another great article about 14 Awesome Fishing Lakes in the Snoqualmie Valley