Klondike Strike is a GOLD mining operation located in the Yukon Territory of Canada. It was established in 1896 and is one of the most famous GOLD rushes in history. The term 'Klondike Strike' refers to the discovery of GOLD in the area, which led to a massive influx of prospectors and miners hoping to strike it rich. The GOLD rush lasted until 1899 and resulted in the establishment of several towns and settlements in the region. The four-letter word for GOLD in this crossword puzzle is 'GOLD'.