The Tsum Valley and Manaslu Circuit Trek is a remote and off-the-beaten-path trek in Nepal that takes hikers through the Tsum Valley and around the Manaslu massif. The trek typically takes around 18-23 days to complete and starts in the city of Arughat. The trail passes through traditional Tibetan villages, dense forests, and remote valleys, and offers great opportunities to experience the unique culture and traditions of the local people. The Tsum valley is a sacred Himalayan pilgrimage valley, which is home to many ancient monasteries, chortens, and mani walls, which are unique to this area.

The trail then continues to Manaslu Circuit trek, where hikers will pass through remote villages, rhododendron forests, and alpine meadows, and eventually reach the Larkya La Pass at an altitude of 5,106 meters, which offers spectacular views of the Manaslu range and the surrounding peaks. The trail also offer a glimpse of the diverse culture and lifestyle of different ethnic groups such as Gurung, Tibetan, and Tibetan refugees.

The trek can be physically demanding and requires good physical fitness, as well as experience in high altitude trekking. Due to its remoteness and the fact that it is less traveled, it is considered as a strenuous and challenging trek with a higher level of adventure.