October can be a difficult time to climb in the Cascades, starting of the 'shoulder season'. Stable weather can persist into mid October some years, so keep your fingers crossed for that.
Eldorado, Sahale, Silver Star, and Ruth/Icy traverse are actually really excellent choices for early October. Typically the glaciers are all passable and any early season snow should not stymie the easy rock climbing found on these peaks too much.
Dispensing piss poor advice for since October, 2000.