I ventured up the Middle Fork road, north of North Bend, WA, on 18 May 2014. It’s an easy drive that any vehicle could do. But turning east up the valley a bit on FF-5620 is another matter. Not really a technical road whatsoever, but it should probably be taken by a 4×4 over your commuter civic. Follow FS-5620 to the very end and you’ll come up onto a very nice trail. Relatively flat with only a minor grade that meanders along a river.
If you continue long enough you’ll come to the connecting trail on your right that leads up to the Goldmeyer Hot Springs.