50K ultramarathons in Hawaii, United States in 2026

9-mile road loop from Kalama Valley Park, gentle elevation, Heartbreak Hill descent, support stations every 2.5 miles, cupless, sustainability focus

Paved point-to-point road ultra from Hilo to Waimea, with major early climbing, a long descent, and a tough exposed Saddle Road course

Challenging 50K course through coffee and macadamia nut fields, featuring elevation changes and 180-degree ocean views on the slopes of rural Kaʻu

Five-island, 250-kilometer course with diverse road, trail, and beach segments set amid Hawaii’s scenery, culture, and history

Multi-distance road ultramarathon on a 3.34-mile loop through Hawaii Kai, featuring out-and-back segments and hydration stations at Kalama Valley Park

Self-supported road ultra across the Big Island, with limited resupply and a rugged, planning-heavy long-distance format.