Summary: we took Taylor River trail -> Quartz Creek road-trail -> Rooster Mountain road-trail (not shown on USGS, shown on Green Trail) -> around 3,520 feet where the Rooster Mountain road-trail turns sharply right and an older alder-covered road continues forward we followed the older road -> we soon abandoned the old road and headed cross-country to the pass -> from the pass we went a short distance west to a small 4,515 foot peak -> from there we went east up the ridge to Rooster Mountain (5,280 feet) -> then down south ridge to coll -> down valley -> Rooster Mountain road-trail.Peak 4515 has a lake very near the top, completely frozen over now. The peak of Rooster Mountain is fantastic, it has 15 feet of rock jutting out of the very top, you can climb to the top of the rock to get to views of Mowitch Lake and Marten Lake (both partially frozen). It's a full 360 degree view, if it hadn't been so cloudy we would have had great views.
Trip type: scramble
USGS quad: Lake Philippa
In: Alpine Lakes Wilderness, Middle Fork Snoqualmie Drainage