Radiocarbon dating carried out on charcoal from the Rotherwas Ribbon has confirmed the feature was created before the Early Bronze Age.
The results of the tests have come back from a couple of laboratories which each dated three samples of charcoal independently and came back with six dates within 200 years of each other.
"It means we can categorically say that the Rotherwas Ribbon was still in use between 2100 to 1900 BC, which confirms provisional dating established by the Worcestershire archaeological service, whose staff excavated the monument last year," said Dr Keith Ray, Herefordshire Council's county archaeologist.
"The results also complement the dates provisionally assigned to the flintwork and pieces of pottery excavated from the paved surface," he added.
"What this means is that the monument was probably first built, and then at least partially resurfaced, sometime in the third millennium BC in the Neolithic period."
He added that while other avenues built at the time were partly paved, the Rotherwas Ribbon was different due to the use of burnt stone and its ribbon-like shape.
"However, many questions still remain concerning the history and purpose of the Rotherwas Ribbon which appears to be just one prehistoric feature among many created in this area to the south of Hereford".
Seventy metres of the length of the Ribbon were uncovered during the investigations last year. Geophysical surveys, funded by English Heritage to try and trace the course of the feature in adjacent fields, are due to take place in coming months.