The adjective, i Pejës, differentiates it from the other Lumbardh tributaries of the White Drin (Albanian: Drinit të Bardhë) in the Dukagjini area.

Peja's Lumbardh originates from the eastern slopes of the Mokra mountain, on the border of Kosovo and Montenegro, at the elevation of 1,900 m (6,200 ft), in the Rugova region of Dukagjini.

It flows to the south and initially receives many small streams coming down from the neighbouring mountains of Hajla, Micinat and Bogićevica.

Passing next to the villages of Bogë, Duganjive and Kuqishtë, on the northern tip of the Micinat mountain it turns east into the Rugova gorge.

The river valley, including the Rugova Canyon, is a route for the road connecting Kosovo with Montenegro, over the Cakor pass.