Milepost 37 Post author By Lmind1 Post date October 3, 2025 Categories In CSX Downtown Spur, Photography and Lighting Having wrapped up its work for the day, Y320 passes milepost 37 and Antillean Marine on the way back to Hialeah Yard. The Spur is three and a half miles long, and all of the mileposts are still in place.