Northern Circuit Route - The Newest and longest Route on Mt Kilimanjaro with High Summit Success The Northern Circuit is the newest and longest route on Mt Kilimanjaro. It was opened for trekkers seeking a remote and extended Mt Kilimanjaro Trek. It is considered one of the best routes on Mt Kilimanjaro as it offers picturesque panoramic scenery, is quiet, offers very good acclimatisation time and thus has resulting high summit success.