from glacier basin head left up mt. ruth. follow ridge all the way up, through camp curtis, to left of steamboat prow summit. follow trail down nasty mud & scree to camp schurman. no crevasses, no worries.
the trail up mt. ruth is a bit steep out of glacier basin, then easy ridge walking the rest of the way to the prow. it's a climbers trail, but should be fairly obvious.
look at a map. it'll all make sense.
have fun!
cheers
jimbo