RiverSea Ultra 2026

The RiverSea Ultra begins on private land adjacent to the Rakahuri River in Canterbury. Runners head 82 km towards South New Brighton, with the start time determined by the tide. This is a flat, point-to-point, mixed-terrain ultra covering 82 km with approximately 45 m of elevation gain and 140 m of loss. The course centers on a unique challenge: remaining near rivers, lagoons, the ocean, or streams without crossing any paved roads. Participants can complete the full distance solo, divide it among a 2-person or 3-person relay team, or opt for shorter distances ranging from 12.5 km to 68 km. The course utilizes stopbanks, riverfront paths, single track, forest trails, farmland edges, and hard-packed beach before concluding beside the estuary. The tide is a significant factor, potentially leading runners to race the incoming water near the coast, with dunes serving as a fallback if the beach line shifts. Six aid stations are positioned along the route, and drop bag locations at 37.5 km and 61.5 km assist with managing the longer solo and relay efforts. Krayzie Kapers is the organizing body, and the event accommodates solo ultrarunners alongside female, male, and mixed relay teams.