Forest Service Roads in the PNW vary by condition and size. There are many FSR roads that rival a 2 lane highway in width and are usually kept in better condition then rural gravel roads. It is not uncommon to be able to almost drive the speed limit on some of these roads and not worry about your vehicle falling apart.

This FSR in the photo is not far from where I live and is at an elevation of ~6000 feet. As you can see, the road is in good condition for late fall and is considered an all weather road...but in the winter, it may be all but impassable due to the snow which could blanket the road within hours.