Here is a list that I compiled of winter climbs that have been done:
Cascades Winter Alpine Climbs
Colfax Peak
Polish Route
Cosley-Houston Route
West Twin Sister
West Ridge
Mt Shuksan
North Face
NW Couloir
Silver Star Mountain
West Face Central Couloir
South Early Winter Spire
South West Couloir
North Early Winter Spire
Early Winters Couloir (East Face)
Cutthroat Peak
East Face
Greybeard Peak
North Face
Pyramid Peak
It ain’t Over
Colonial Peak
Watusi Rodeo
Eldorado Peak
NW Ice Couloir
Davis Peak
NW Face Couloir
http://www.ademiller.com/climbing/galle ... /index.htmJohannesberg Peak
NE Buttress
Mixup Peak
West Face Couloir
Dragontail Peak
NE Couloir
http://cascadeclimbers.com/forum/ubbthr ... ber=853017 Triple Couloirs
Direct North Face
Colchuck Peak
NE Couloir
North Ridge Couloir
Argonaut Peak
NE Couloir
Mt Stuart
Stuart Glacier Couloir
NW Face
http://cascadeclimbers.com/forum/ubbthr ... ber=681501Big Four
North Face (various)
Hall Peak
North Face
Three Fingers
North Peak NE Face
http://cascadeclimbers.com/forum/ubbthr ... ber=644072Mt Snoqualmie
NY Gulley
Pineapple Express
http://cascadeclimbers.com/forum/ubbthr ... ber=863820Chair Peak
East Face
NE Buttress
North Face
Bryant Peak
North Face
The Tooth
NE Slab
East Face
Abiel Peak
North Face (several)
Mt Kent
North Face (several)
http://cascadeclimbers.com/forum/ubbthr ... ber=868676 Mt Index
North Face
Eve Dearborne Memorial Route
Murphy’s Law
Middle Index
North Face
Lane Peak
The Zipper
The Fly
Pinnacle Peak (Tatoosh Range)
North Ridge
Mt Hood
North Face (Two options)
Black Spider
Reid Glacier Headwall
Illumination Rock
(Multiple routes)
Mt. Outram -
1. Ghost Passenger III WI3
Mt. Brice - Graveyard Shift IV AI3
Twin Needles - Thread of Ice III - Snow
Chiwawa Mountain - Intravenous IV WI4 M6
Silver Star Mountain - West Face Central Couloir III AI2 M4
Pyramid Mountain - NW Face 'It Aint Over Mother Fuckers' IV M4
Summit Chief - Alpine Chicken IV AI4+ 5.8 RSummit Chief - North Face III AI3
Three Fingers - NE Face IV WI4+ M3
Mt. Stuart - Lara Kellog Memorial Route IV WI6 AO
Hall Peak - NW Face III 5.6 WI3
White Chuck - East Face Couloir WI3 5.8 R
Abiel Peak - Spindrift Daze III AI3+
Abiel Peak - It's Al-Der III AI4
Abiel Peak - North Face Direct III WI4
Snow Creek Wall - Swing and a Prayer IV WI5 M6 R
Lake 22 Headwall - NW Chutes IV AI4
Mt. Index - West Face 'Murphy's Law' V AI3 M4
Nason Ridge - North Face 'Alpine Dropout' III+ WI3
Whitehorse Mountain - East Face III+ AI4
http://www.ademiller.com/blogs/climbing/highlights