First of i want to say that i am experiencing repeated game crashes and that i have tested this across two different xbox consols using two different game copies so this is not a hardwear issue it is however extreamly frustrating

Im at the stage in the main quest where i must go with delphine and esbern to alduin's wall but when ever i come close to enterance of karthspire the game freezes up preventing me from making progress in the MAIN quest. I have tried to aproach karthspire from diffrent angles and fast travle... nothing works, infact when i try to fast travle the game freezes in the loadingscreen! i have put over 130 hours into this character and i would hate to start over with him since he's story in skyrim is not nearly finished. has anyone else had this happen to them? and please for the love of talos is there a fix? any help is most welcome! thanks.

Try to start from any save just prior to the karthspire questline, something before Esbern meets up with Delphine. go into a shop, or tavern, and wait a full real time in game minute. Do a hard save. Reload the game and play from that hard save onward.