The Cayoosh Gold Rush was one of several in the history of the region surrounding Lillooet , British Columbia , and , if estimates of its yield are true , one of the richest single finds in the gold mining history of that province .
The Cayoosh Gold Rush was one of several in the history of the region surrounding Lillooet , British Columbia , Canada . 
 If estimates of its yield are true , it would be one of the richest single finds in the gold mining history of that province .