trail race with elevation gain

For trail races with elevation gain, consider the Ninh Binh Karst Trail Run on 2026-09-25, which is a dramatic trail run through limestone karsts. Another option is the Da Nang Bay Ultra on 2026-08-26, a scenic ultra along the coastline and hills. The Son Tra Peninsula Trail on 2026-08-16 also fits, offering a demanding climb through the jungle.