Drive to the Eagle Lake trailhead and ride this as an out and back. If you continue through to Foggy Dew I recommend a shuttled car as riding the road in this area would be nothing but a bummer! Steep the entire way, washboards, HOT, steep.
The trail though, DAMN! It's amazing. The horses and motos have churned up the dirt so it zaps a little energy on the climb, but it's worth it for the descent. Climb consistently the entire way to Upper Eagle Lake, use the map, but there are still a couple unmarked junctions (I think we went up at each unmarked junction). The climb is about 6 miles. The descent is possibly the best descent in WA. I haven't done them all, but this is an unrelenting flow, 6 miles, rock slabs, chunky rocks, flowy dirt, little g-out dips, and FAST. It's awesome!!! Oh yeah, and you can swim in the lake at the top, how could the ride be better?