Would like to explore dirt roads in western WA

I’m from western Oregon and am used to exploring the many forest service roads that crisscross the Willamette valley. Many of them are through to other service roads or rural highways, too, not just point to point. I’m looking at the Benchmark Maps Washington roads big book and… I just don’t see many of the little dashed brown lines I’m used to seeing in OR- you know what I mean?

Is the forest up here around… Mt Baker Snoqualmie National Forest, for example, just not accessible? I see areas labeled Weyerhaeuser Snoqualmie Tree Farm east of Duvall, north of Snoqualmie, west of Skykomish- but not many gravel/dirt roads, really?

I see a little road along the North Fork Snoqualmie river north of North Bend that I’m going to go explore tomorrow- but that looks like it just dead ends up on Mt Baker? Too bad there’s no through way up to Skykomish, or something.

Regardless- anyone know of any resources or suggestions for fun dirt roads to explore within a days ride of Seattle? Thanks!