There are differences of opinion about the location and boundaries of the subranges of the northern Cascades, although early geologists and topographers had a fundamental agreement on the topic. The Hozomeen Range was seen as bounded by the Skagit River on the west and extending east to the Pasayten River (east of the Sumallo River) and Coquihalla River. The core of the Hozomeen Range under this definition marks the divide between streams in British Columbia that flow west to the Fraser River and those that flow via longer routes via the Nicola River, Thompson River, and Similkameen River tributaries into the Fraser or Okanagan River. This early nomenclature defined the Hozomeen Range as extending south of the US border and including the peaks of the Hozomeen Mountain area.