The Mountain Imperial Pigeon has a dark maroon-brown back and pale purplish-grey head and underparts. In Borneo it is common in montane forest, and some birds fly to lowlands to feed.
The head, neck, breast, and belly are purplish grey, with a white throat, dark maroon mantle and wing coverts, and a broad pale grey band on the tail.
In Borneo, mountain-forest populations make daily flights to lowland feeding areas. Coastal birds bathe in mangrove water and travel inland.
An extinction-risk assessment has not been added yet.