An 81-year-old man and his 72-year-old wife have appeared in court after being arrested at a protest to save a group of 4,000-year-old stones.
The Rotherwas Ribbon is 60m (197ft) long
Mervyn and Virginia Morgan, of Westfield House, Ross-on-Wye, pleaded not guilty to aggravated trespass at Hereford Magistrates' Court.
A third defendant, Jacqueline Tonge, 46, of Bute Avenue, Putson, spoke only to confirm her name and address.
The charges relate to an incident at a Herefordshire Council cabinet meeting.
Eight people were arrested at the meeting, on 12 July, after taking part in a sit-in at the council's Brockington building.
Archaeologists have said the 197ft (60m) Rotherwas Ribbon, found by road builders, could be as important as Stonehenge.
Herefordshire Council wants to build a protective shield over it and build a relief road over it.
The case was adjourned until 1 August, where Ms Tonge is expected to enter her plea.
All three were granted unconditional bail.