Shortly I'm planning a drive from central Oregon up to Seattle. It's a longer drive than I want to do without stopping, but I have all day to do it. My plan therefore was to stop at several points along the way, and go do a short hike (eg 0.5-2 hours) at each pause.
What I'm struggling with is working out where to stop along the way. In the UK, I'd stalk along my proposed route with Ordnance Survey 1:50k maps, looking for likely carparks just off the route with walking trails and/or lookouts nearby.
For this trip, I'm using google maps, but even when zoomed in I can't spot anything equivalent. Even for a place I passed on the way here which I know has a trail-head carpark and several walks of varying length. Around cities it seems pretty good (eg looking at some of the areas around Portland), but out in the countryside I'm struggling.
Are there any good resources for finding shortish (less than half a day) walks, with marked trails (no maps or similar required, so beginner / family friendly) starting from near major roads (interstates, US routes, bigger state routes) in the Pacific North West? With all the mountains and all the driving round here, I'd hope there is, just need help finding it!