Full Quieting Mountain was instead fully quiet at least on 2m FM. Maybe it should be called Evil Step Sister as it lurks unattractively above Sleeping Beauty. (Did fine on HF)
Looks like there may be a shorter bushwhack from the north when examining the map. However, I was invited to hike Sleeping Beauty by some friends. Answering the question why isn’t Sleeping Beauty a SOTA summit leads you to Peak 5060, which has the required promonance.
So I started from the official Sleeping Beauty trailhead:
https://www.oregonhikers.org/field_guide/Sleeping_Beauty_Trailhead
I turned left off the trail at the saddle where the trail goes right, 46.0938, -121.6524. Then I tried to stay north of the ridge line to avoid false summits. Didn’t work as there are thick stands of young trees there. The bushwhack is not bad, no thick brush to whack. Lots of logs to step over and a few logjams to negotiate, but not bad at all. Top is wooded with no views. Plenty of trees for antenna work.
If you just do the summit expect 3.8mi round trip and 1500 ft. elv. gain, but don’t do that. Head over to the spectacular views on Sleeping Beauty. That gets a total of 4.4 miles and 1970 ft. of gain.