The River Boyne in County Meath, Ireland, is a historically rich waterway that flows past some of the country's most significant medieval and ancient landmarks. The most developed paddling route is the Boyne Blueway at Trim, an 8-kilometre stretch that takes approximately 2.5 to 3 hours to complete. The river along this section is graded at Grade II, meaning it is generally slow-moving and easily managed, with no weirs or obstructions, making it accessible to beginners as well as more experienced paddlers.

The primary access point for the Blueway is the Boyne Valley Activities Centre on Jonathan Swift Street in Trim, which serves as a full-service base offering kayak hire, boat washdown facilities, showers, toilets, and coffee facilities. A shuttle bus operates from Bective Mill back to Trim, simplifying logistics for those paddling the full downstream route. Guided kayaking trips are available through Boyne Valley Activities, who also offer historical raft tours and kayak training sessions for adventure racers.

Paddling the Trim section brings you past Trim Castle, Newtown Abbey, Rathnally Mill, and the Priory of St. John the Baptist. The river also passes near the Hill of Tara, the ancient seat of the High Kings of Ireland, and through the town of Navan further downstream. The density of medieval and prehistoric sites along the corridor is notable, with Trim itself described as having more medieval buildings than any other town in Ireland.

Further downstream, the River Boyne reaches Drogheda, where it meets the sea. The tidal estuary at Drogheda is a working commercial port, and vessels entering the river are advised to contact the harbour master on VHF Channel 11 before approach. The harbour master's office is located on the north side of the town quays, approximately 700 metres above the Boyne Viaduct.

Stand-up paddleboarding is also practised on the river, with the Navan area noted as a location where SUP users take to the water. The Boyne Blueway at Trim is part of Ireland's broader network of multi-activity recreational water trails, and the route sits within the Ireland's Ancient East tourism region.