Haast Pass / Tioripatea is a mountain pass in the Southern Alps of the South Island of New Zealand. Māori used the pass in pre-European times. The pass takes its name from Julius von Haast, a 19th-century explorer who also served as provincial geologist for the provincial government of Canterbury. Following the passage of the Ngāi Tahu Claims Settlement Act 1998, the name of the pass was officially altered to Haast Pass / Tioripatea. The pass lies within the limits of Mount Aspiring National Park and forms part of the boundary between the Otago and West Coast regions.