parting of the ways
parting of the ways {n. phr.}
1. The point where a road or path divides; a fork.
They stood undecided at a parting of the ways, where a forest path forked.
2. A time or place where a choice must be made; a deciding point.
He had come to a parting of the ways: he had to choose the high school courses that would prepare him for college, or the courses that would prepare him for business.
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Source: A Dictionary of American Idioms
