Motutere / Castle Rock is a 525-metre-high (1,722 ft) mountain southeast of Coromandel, Waikato, on New Zealand's North Island.

[1] The mountain is a volcanic plug made from remnants of solidified magma, the softer surrounding rock having been eroded away.

Māori explorers of the area tended to travel along the hill ridges, so avoiding the thick vegetation in the sheltered valleys.

[3] In 2018, the name of the peak was officially gazetted as Motutere / Castle Rock, to incorporate its original Māori name.

Access is via a forestry track that leaves the 309 Road near the Waiau Waterworks visitor centre and involves a 25–40 minute walk in.