Jaren is the administrative centre of Gran Municipality in Innlandet county, Norway. The village is located about 55 kilometres to the northwest of the capital city of Oslo. The lake Randsfjorden lies about 7 kilometres west of Jaren. The village of Brandbu lies about 3 kilometres to the northwest and the villages of Ringstad and Gran lie about 4 kilometres to the southeā¦Jaren is the administrative centre of Gran Municipality in Innlandet county, Norway. The village is located about 55 kilometres to the northwest of the capital city of Oslo. The lake Randsfjorden lies about 7 kilometres west of Jaren. The village of Brandbu lies about 3 kilometres to the northwest and the villages of Ringstad and Gran lie about 4 kilometres to the southeast.