Grizzly River Run is a river rafting ride at Disney California Adventure Park at the Disneyland Resort in Anaheim, California. It is similar to Kali River Rapids in Disney's Animal Kingdom and the Shipwreck Rapids ride in SeaWorld. The attraction's name comes from Grizzly Peak, the bear shaped mountain that the rapids flow around. It was built by Intamin.
The raft trip around Grizzly Peak begins with the rafts being lifted up a wooden conveyor that runs under leaking pipes that spray water on the riders. Upon reaching the top of the conveyor, the rafts are dropped into the water to descend the peak, passing through a cave and bumping against a log jam. The climax of the ride drops the rafts down into a geyser field. The final drop has a unique element in that the rafts are spun as they begin their descent.
As with all flume-type rides, there must be a location to store or drain the water in the upper sections of the flumes when the pumps are shut down. The original plan was to create a large, underground basin beneath Grizzly Peak to hold water. This would have required costly excavation and construction. Upon looking at the final layout of California Adventure, it was noticed that the Pacific Wharf area of the park had a water element meant to simulate a tidal basin. The tidal basin is located across a walkway from Grizzly River Run and became the catch basin for water from the raft ride. The rise and fall of water in the tidal basin serves the dual purpose of providing a location to store water and being a scenic element that simulates a rising and falling tide.
The ride is one of three in American Disney Parks taking the names of former Opryland USA attractions. A similar ride at the now-defunct park in Nashville, Tennessee was called the Grizzly River Rampage.