In the story of the Akedah (the binding of Yitzchak on the altar) the telling is very specific on mentioning more than once that Avraham and Yitzchak went up to Mt. Moriah together and were in mutual agreement on the sacrifice. However, upon descending from the Mount the Torah says that only Avraham returned to his two servants who had stayed behind with the donkey and he (not Yitzchak) went to Beersheva where he dwelt.
We know from Torah that Sarah's tent was in Hebron (she likely had died before this event) since Yitzchak was at least 37 at the time of the Akedah. He was living in his mother's tent about 26 miles from his father's dwelling. It was three years later he married Rivkah and took her into his mother's tent and knew her.
I was always intrigued as to why the whereabouts of Yitzchak had to be pieced together from other portions of Torah to try and understand why he wasn't mentioned as descending Mount Moriah with his father.
What do you think? I would like to know your thoughts on this in the comments section.