Library / Southwest 9th Avenue and Galleria / Southwest 10th Avenue - 11th Avenue Loop Tracks

The three 11th Avenue Loop tracks allow westbound trains terminating in downtown Portland access to Yamhill Street from Morrison Street. Previous to the opening of the Westside section of what is now the Blue Line, all trains used this facility to turn around. Red Line trains used them from that line's was opening in 2001 until it was extended to Beaverton Transit Center in 2003. Then, Portland Vintage Trolley still used it on Sundays, and starting in 2004 Yellow Line trains used the loops every day until the Yellow Line and Vintage Trolley both moved to the Portland Transit Mall. Presently, there is no regularly scheduled use of the turnaround loop here, but it is often used to store trains temporarily for use after events, such as a game at nearby Jeld-Wen Field stadium.

When TriMet began using colors to designate rail lines (2001), this was considered the western terminus for what is now the Blue Line, until it was expanded westward to Hillsboro in 1998; this was also the case for the Red Line when opened in 2001 until it was extended west to Beaverton Transit Center in 2003. It was then used as the western terminus for the Yellow Line until it moved to the Portland Transit Mall in 2009.

Due to safety concerns, passengers are not allowed on trains passing through the loop and must disembark at the Galleria platform (though this was formerly allowed, without incident). The yard takes up about half a Portland city block, and includes a small maintenance pit and an operator break room. It is also used to store trains for special events.