This is a very interesting topic because I watch the Ten Commandments every year and the water splitting at Red Sea is a powerful miracle done to free the Israelites from Egypt. Mostly it speaks of the people being baptized into a covenant agreement with God before going to Mt. Sinai, 1 Corinthians 10:1-2. There is the local story of the Reed Sea in a higher place on the ocean. It can be mostly what you want to believe there is no eyewitness of the account, no divine marker in the Sinai area.
If the water raised a few feet into the air on both sides creating a wall is not hard to believe. If nearly a million people walked through the water on dry ground all night, it is still believable. It only indicates that the distance of one shore to another shore must have been a mile or more. It is still believable. Maybe the challenge here would be to question if the waters really split in half and the ground became dry. It was a miracle, and it should be treated like one as in a phenomenon that occurred only once for a few hours.
This story as many in the Bible are geared at building faith and its goal can only be accomplished if faith in the occurrence truly happened in your heart, Romans 15:4. Science can ask questions that tests the miraculous feat of splitting a Sea in half to form walls on both sides, it is still believable no matter how you questioned it because faith is the key.
