Portsmouth Coastal Waterside Marathon 2026

The Portsmouth Coastal Waterside Marathon is a winter race weekend on England's south coast, centered on the Southsea seafront in Portsmouth. Participants can select from a marathon, half marathon, and shorter distances like 12K. Some editions of the series also feature a 50K ultra. The courses are flat, incorporating promenade, waterfront paths, coastal tracks, and multi-terrain sections, rather than being purely road races. The marathon begins seaside at Southsea, proceeding out and back towards Hayling Island. The route traces the edge of Langstone Harbour and other shoreline segments around Portsmouth. Runners will find expansive views across the Solent, extensive harbour running, well-supplied aid stations, and finish medals. The event embraces its winter timing with a festive atmosphere, and the broader Southsea event schedule includes fireworks over Southsea Common.