<P> The Pike's Peak Gold Rush (later known as the Colorado Gold Rush) was the boom in gold prospecting and mining in the Pike's Peak Country of western Kansas Territory and southwestern Nebraska Territory of the United States that began in July 1858 and lasted until roughly the creation of the Colorado Territory on February 28, 1861 . An estimated 100,000 gold seekers took part in one of the greatest gold rushes in North American history . </P> <P> The participants in the gold rush were known as "Fifty - Niners" after 1859, the peak year of the rush and often used the motto Pike's Peak or Bust! But in fact the location of the Pike's Peak Gold Rush was 85 miles (137 km) north of Pike's Peak . It was only named Pike's Peak Gold Rush because of how well known and important Pike's Peak was . </P> <P> The Pike's Peak Gold Rush, which followed the California Gold Rush by approximately one decade, produced a dramatic but temporary influx of immigrants into the Pike's Peak Country of the Southern Rocky Mountains . The rush was exemplified by the slogan "Pike's Peak or Bust!", a reference to the prominent mountain at the eastern edge of the Rocky Mountains that guided many early prospectors to the region westward over the Great Plains . The prospectors provided the first major European - American population in the region . </P>

Who used the phrase pikes peak or bust