Trails and Parks
Skagit Land Trust https://www.skagitlandtrust.org/
Trails.com maintains a huge library of hiking itineraries. Search by location. While a paid subscription is required to see detailed information, the free service usually plenty sufficient to find a great trail. http://www.trails.com
8 Kid-Friendly Hikes Just 90 Minutes (or Less) From Seattle.
From a fun island hike to flat trails through gorgeous gardens, try these terrific hikes for families: https://www.parentmap.com/article/best-kid-friendly-hikes-seattle-tacoma