Several small groups of caribou inhabit an interior mountain range that stretches from Galena Mountain (VABM Bald), through the Kokrine Hills and Ray Mountains, to the Chandalar River. The identity of these groups have remained unknown until the present. The Alaska Department of Fish and Game (ADF&G) once thought that these animals were part of the Western Arctic Herd, when its numbers were in excess of 250,000 animals. Their migration into the Koyukuk drainage has not occurred since the mid-1970's, but caribou may return sometime in the future as their numbers return to former levels. Therefore, these remnant animals may now constitute their own herd group. Seventy animals were counted on Tanana Ridge (unnamed hills extending northeast of Tanana village) in March 1977 and 20 in the Ray Mountains in August 1978 by ADF&G (Davis 1978). Farquhar and Schubert (1980) reported 78 animals between upper Torment Creek and Mt.Tozi during their 1979 summer excursion. This paper will report the progress of population surveys conducted by the BLM since 1979.