Todd's crew unearths evidence of a massive prehistoric creature that may or may not lead to big gold. Tony is forced to rebuild his washplant and Parker opens the biggest cut of his life in an attempt to get more gold than his rival Todd.
With the arctic winter looming, the crew races against the clock. Rain and thawing snow flood the mine and Jack puts his life on the line as the glory hole caves in around the massive 100,000 pound excavator.
The Hoffman crew is desperate to get 100 ounces, but Todd's decision to run the dozer on solid ice ends in disaster. The Big Nugget mine faces closure if Parker fails to hit pay dirt. Dakota Fred thinks he's finally found Jack Hoffman's glory hole.
It's the dayshift vs the nights as Todd pushes his men harder than ever. Parker battles his ancient washplant and the treacherous road from Discovery Claim while Dustin risks it all diving for hidden gold in the frozen glory hole water.
Out of Indian River paydirt, Todd comes up with a risky plan to hit his 1,000 oz goal. A bad fall puts Fred out the game, leaving Dustin to dig the glory hole. Parker worries his season is over but his grandpa is convinced he’s near the motherlode.
Todd’s claim owner arrives unannounced to take stock of the Hoffman’s operation. Dustin returns from the mountains just in time for the final clean up. Unwilling to admit defeat, Parker uses a new piece of equipment to thaw his frozen paydirt.
The Hoffmans overcome a lack of water to get a monster clean up. Tony finally gets his dredge on the way to its new home in Eureka Creek. Parker gets the biggest gold clean up in Gold Rush history.
The Hoffman crew makes a desperate bid to hit their season goal. Tony’s attempt to run his million dollar gold dredge ends in a shipwreck. Parker fights the big freeze as he pushes to hit his 2.4 million dollar goal.
Parker faces mutiny, the Hoffmans get the largest dozer in the Klondike and Tony takes one last shot at getting his dredge mining for gold. Then, in a Gold Rush first, Parker, Tony and Todd appear together to discuss the epic season finale.
Todd runs two massive washplants, Tony pushes to get his dredge out of the water before it freezes and Grandpa John comes to see if Parker has beaten his rival Todd. Then, Parker, Todd and Tony appear together to discuss the epic season finale.