I want to do south and middle sister sometime in the upcoming month, over 1 or 2 nights, single trip. Depending, of course. I am not that familiar with the trailheads near the sisters. But I am under the impression (partially since coming from Corvallis) that the Obsidian Creek TH would probably be the way to go.
Preliminary plan, TBD...Day 1:
The plan was to start at Obsidian Creek TH and camp at the saddle between the mountains, in the vicinity of the Irving Glacier or Chambers Lake.Day 2a:
Middle Sister first. Probably follow the weakly defined ridge above the Irving Glacier and then head a little East and meet up on the ridge that seems like it meets the southern side of the Hayden Glacier. Then back down as I determine seems reasonable.Day 2b: South Sister via the north side. Not sure on this one, this is where I really want input!
I haven't read much on north side ascents. I was thinking the ridge thats between the Eugene and Lost Creek Glaciers. I am not sure, though, like said there isn't as much info. From being at the top of South last year via Devils Lake TH I do remember there being a bit of a crest it at the top that could be tricky to get around/over. I didn't look that hard last year or circle the crater, but I remember thinking that. Maybe depending if I get a ice tool or two by then. Not sure if there will be any sort of a cornice remaining, I wouldn't think so.
Anyhow pretty much open to any suggestion of routes. I'll probably be solo'ing them/it, maybe one or the other, TBD. I'd like to do them both, assuming the north side of South Sister isn't a big hazard. I have like 5 days off next week, so I might want to do it then.
Says the Obsidian TH is open too. If there is a snow bank and I get stuck, maybe it'll melt out by the time I get back. Lolhttp://www.fs.usda.gov/Internet/FSE_DOC ... 299503.pdf