iner ary ▁is ▁also ▁known ▁as ▁La ▁route ▁des ▁A igu illes ▁Gr ises . ▁After ▁crossing ▁the ▁Mi age ▁Gla cier , ▁clim bers ▁spend ▁the ▁night ▁at ▁the ▁Gon ella ▁refuge . ▁The ▁next ▁day , ▁one ▁proceed s ▁through ▁the ▁Col ▁des ▁A igu illes ▁Gr ises ▁and ▁the ▁D ôme ▁du ▁Go û ter , ▁con cluding ▁at ▁L ' ar ête ▁des ▁B oss es ▁( B oss es ▁r idge ). ▁ ▁The ▁Mi age ▁— ▁B ion n ass ay ▁— ▁Mont ▁Bl anc ▁crossing ▁is ▁usually ▁done ▁in ▁three ▁days , ▁and ▁has ▁been ▁described ▁as ▁a ▁truly ▁mag ical ▁expedition ▁of ▁ice ▁and ▁snow ▁ar êtes ▁at ▁great ▁alt itude . ▁The ▁route ▁begins ▁from ▁Cont am ines - Mont jo ie , ▁with ▁the ▁night ▁spent ▁in ▁the ▁Cons crit s ▁cabin . ▁The ▁following ▁day , ▁the ▁D ô mes ▁de ▁Mi ages ▁is ▁crossed ▁and ▁the ▁night ▁spent ▁at ▁the ▁Dur ier ▁cabin . ▁The ▁third ▁day ▁proceed s ▁over ▁l ' A igu ille ▁de ▁B ion n ass ay ▁and ▁the ▁D ôme ▁du ▁Go û ter , ▁finally ▁reaching ▁the ▁sum mit ▁of ▁Mont ▁Bl anc ▁via ▁the ▁B oss es ▁r idge . ▁ ▁Ref ug es ▁ ▁Ref uge ▁Vall ot , ▁ 4 3 6 2 ▁m ▁Ref uge ▁Go û ter , ▁ 3 8 1 7 ▁m ▁B iv ou ac ▁Cor rado ▁Al ber ico ▁– ▁Luigi ▁Borg na , ▁ 3