Zaldiaran is a 978 metres high mountain part of the Montes de Vitoria mountainous range, located on Alava, Basque Country (greater region). Even if part of the south face of the mountain is on the Treviño exclave, (Burgos), the summit is itself on Alava.Next to the summit, some metres below, there is the Zaldiarango gaina, with a height of 780 metres (2559 ft); a mountain pass that communicates Alava with the Treviño exclave at its highest point, where the frontier is located.