The Nicoamen River is a tributary of the Thompson River

Thompson River

The Thompson River is the largest tributary of the Fraser River, flowing through the south-central portion of British Columbia, Canada. The Thompson River has two main branches called the South Thompson and the North Thompson...

 in the southern Interior of British Columbia

British Columbia Interior

The British Columbia Interior or BC Interior or Interior of British Columbia, usually referred to only as the Interior, is one of the three main regions of the Canadian province of British Columbia, the other two being the Lower Mainland, which comprises the overlapping areas of Greater Vancouver...

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, located 15 km upstream from its confluence with the Thompson at Lytton

Lytton, British Columbia

Lytton in British Columbia, Canada, sits at the confluence of the Thompson River and Fraser River on the east side of the Fraser. The location has been inhabited by the Nlaka'pamux people for over 10,000 years, and is one of the earliest locations settled by non-natives in the Southern Interior of...

.

The Nicoamen forms the extreme northeast boundary of the Cascade Mountains

Cascade Range

The Cascade Range is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, and the notable volcanoes known as the High Cascades...

 and part of the western boundary of the Thompson Plateau

Thompson Plateau

The Thompson Plateau, also known as the Okanagan-Thompson Plateau, forms the southern portion of the Interior Plateau of British Columbia, Canada, lying to the west of Okanagan Lake, south of the Thompson River and to the east of the Fraser River...

. Located nearby is the Nicoamen Plateau

Nicoamen Plateau

The Nicoamen Plateau is a small sub-plateau of the Thompson Plateau in the southern Interior of British Columbia, Canada, located between the Nicoamen River and the lower valley of the Nicola River .-References:...

, a small subplateau of the Thompson Plateau.

History

The confluence of the Thompson and Nicoamen is the site of one of the incidents which led to the Fraser Canyon Gold Rush

Fraser Canyon Gold Rush

The Fraser Canyon Gold Rush, began in 1858 after gold was discovered on the Thompson River in British Columbia at its confluence with the Nicoamen River. This was a few miles upstream from the Thompson's confluence with the Fraser River at present-day Lytton...

 of 1858-60, as the location of a meet-up between the Nlaka'pamux

Nlaka'pamux

The Nlaka'pamux , commonly called "the Thompson", and also Thompson River Salish, Thompson Salish, Thompson River Indians or Thompson River people) are an indigenous First Nations/Native American people of the Interior Salish language group in southern British Columbia...

people of the area and American miners.