The California Gold Rush began on January 24, 1848, when gold was found by James W. Marshall at Sutter's Mill in Coloma, California. The news of gold brought some 300,000 people to California. The gold-seekers, called "forty-niners" (as a reference to 1849), traveled by sailing ship and covered wagon and often faced substantial hardships on the trip. At first, loose gold and gold nuggets could be picked up off the ground. Later, gold was recovered from streams and riverbeds using simple techniques, such as panning. More sophisticated methods were developed and later adopted elsewhere. At its peak, technological advances reached a point where significant financing was required, and mining companies became important. Gold worth tens of billions of today's dollars was recovered, which led to great wealth for a few. However, many returned home with only a little more than what they had originally started with.
The effects of the Gold Rush were substantial. San Francisco grew from a small settlement of about 200 residents in 1846 to a boomtown of about 36,000 by 1852.
To find this cache you must strike gold 15 times – by collecting gold teeth from 15 of the caches in the Just Ducky series – and I’m not going to tell you which ones they are! Good luck!
You can validate your puzzle solution with certitude.