Post author By Julieanne Post date December 28, 2015 Home » Attractions » Sunken Trace – Collinwood, TN Milepost 350.5- Sunken Trace- Three sections of the original road show how the route was relocated to avoid mudholes. ← McGlamery Stand – Natchez Trace Parkway, TN → Holly – Natchez Trace Parkway -TN