The two-time Olympian will be moving back to Boulder, Colo., on Jan. 1.
The 23-year-old took fourth at the Fifth Avenue Mile.
The former 10,000m record holder joins a strong American field.
She wanted to double in the 10,000m and half this week.
The American-record holder continues to struggle.
A miler no more, the talented track star is hoping to revitalize his career by moving up to longer distances.
The fastest American in the mile is heading back to Portland.
The Olympian will rejoin her college coach in Ames.
The upcoming Olympic marathon remains her main focus.