Castor is 4228m, graded PD Snow or Ice to 35deg.
Guide time from the Klein Matterhorn to the foot of the mountain 2-3hrs, 2hrs for the ascent.
Although it is a big mountain, it is dwarfed by the Monte Rosa Massif and the Lyskam.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe