Aiako Harria is located in the north east of Gipuzkoa (Spain) and borders on France, along the River Bidasoa, and with Navarra.

It is reached from Oiartzun along the local roads to Irun through Castillo del Inglés (GI-3631), to Lesaka over Aritxulegi (GI-3420) and which leads to the Arikutza reservoir (GI-3633). That road takes you from Irún to Oiartzun. If you leave from Hernani and Errenteria, you get there through Ventas de Astigarraga. The Añarbe sector is reached from the Hernani to Goizueta road (GI-3401).