The Post Track is an ancient causeway in the valley of the River Brue on the Somerset Levels, England. It dates from around 3838 BCE,^[1] making it some 30 years older than the Sweet Track in the same area.^[2] Various sections have been scheduled as ancient monuments.^[3][4][5][6]

The timber trackway was constructed of long ash planks, with lime and hazel posts spaced along three-metre intervals. According to Coles, the heavy planks of the Post Track were seldom pegged. ^[7][8] The track follows closely in line with the Sweet Track and, before the planks were dated, it was posited that it served as a construction platform for the Sweet Track.^[9][10] It is speculated that it led to places of spiritual significance. It is likely that the route was intended to be a permanent fixture, with the track being updated, maintained, and eventually replaced as it succumbed to the elements.^[11] Some of the wood planks also were reused in the Sweet Track when it was built making the specific dating more complex.^[12]