Dawson City became a boom town of over 37 times its current population, but under Sam Steele's command the Mounted Police was able to avert disorder.  
The discovery that led to this event was registered under the name of George Cormack due to anti-Native American racism of the time, but the actual discovery was by Tagish First Nation member Skookum Jim Mason.  For two winters, famine threatened the area due to the influx of people, famously depicted by Charlie Chaplin eating a (*) shoe.  Later regulation by the Mounties forced incomers to bring a year's worth of supplies.  Dawson City became a boom town of over 37 times its current population, but under Sam Steele's command the Mounted Police was able to avert disorder.  FTP – name this late 19th Century mass migration for mineral prospecting along a Canadian River.
The discovery that led to this event was registered under the name of George Cormack due to anti-Native American racism of the time, but the actual discovery was by Tagish First Nation member Skookum Jim Mason.  
{Klondike Gold Rush} (prompt on {Yukon Gold Rush})