The nearest train station is Plouharnel-Carnac, about 2 kilometres from the alignments, on the Auray–Quiberon line. Auray is the main junction, with connections to Rennes, Nantes, and Paris. From Paris Montparnasse, the TGV to Auray takes around 3 hours; from Auray to Plouharnel-Carnac is a further 15 minutes by TER.
By car, Carnac is about 30 kilometres from Vannes via the D768. In summer, parking near the alignments fills up early; arriving before 9am avoids the worst of it. A shuttle bus operates between Carnac town and the main alignment sites in July and August.