A somewhat more difficult and longer route than the standard south side. Involves climbing on the Prouty Glacier, and some scrambling through rock bands. A late season bergschrund can make this route impassible. Approach via Green Lakes. Can be done car to car in a long day.

Other Information
Driving Distance from Portland 190 miles
Driving Time from Portland 4 hours
Expected Duration Car to car in two or more days
Relevant Books Oregon Highby Jeff Thomas Climbers Guide to the Cascade Volcanoes by Jeff Smoot
Relevant Maps USGS 7 1/2 minute series: South Sister, and Geo-Graphics, Three Sisters Wilderness <href="http: "="" adventure="" c463="" starts-here="" title="On the Mazama Climbing and Hiking map page " www.mazamas.org="" your="">On the Mazama Climbing and Hiking map page <href="http: maps.google.com="" maps?f="q&source=s_q&hl=en&geocode=&q=middle+sister&sll=44.103449,-121.769206&sspn=0.018891,0.04549&g=north+sister&ie=UTF8&ll=44.127028,-121.734352&spn=0.151065,0.363922&t=p&z=12"" title="Google maps">Google maps</href="http:></href="http:>
Awards Qualified 16 Major NW Peaks, Seven Oregon Cascades Peaks