The Boulder Bank (Māori: Te Taero a Keropa or Te Tāhuna o Tama-i-ea) is a very unusual naturally formed landform in Nelson, New Zealand. It is a 13 kilometre long stretch of rocky substrate which begins at the and ends at the Cut of the Nelson Harbour. Haulashore Island was once a part of the Boulder Bank, but the Cut made it an island, and it is no longer connected to the Boulder Bank. The Boulder Bank separates Tasman Bay and the Nelson Haven and is managed as a scenic reserve by the Department of Conservation. Land access is gained along Boulder Bank Drive, signposted at the northern end of Nelson Haven on State Highway 6.