Griff Creek is a 9.6-mile out-and-back from Madison Falls Trailhead, counting roughly two miles each way on Olympic Hot Springs Road and a short bypass, then 2.8 miles each way on the trail. Plan about six to eight hours. The road walk is a gentle warm-up; the named trail climbs steeply through montane forest to a small open clearing near 3,300 feet. With the long approach and sustained grade, the whole outing feels like a hard day.
If you want a shorter day, turn around at the second viewpoint. With the road approach, that makes about eight miles round trip and still reaches a broad view over the Elwha.