Question: What is Grizzly Peak's main attraction?
About the article "Disney California Adventure", section "Grizzly Peak".

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Grizzly Peakelevation , is the highest thirteener summit in Colorado.
The mountain is composed of andesite lava flows and breccias of Oligocene age.
It is located in the Sawatch Range on the Continental Divide, on the border between Pitkin County and Chaffee County.
Grizzly Peak is the 54th highest peak in Colorado by most standard definitions, just missing the list of Colorado fourteeners.
At one time, the peak's elevation was measured to be over and it was believed to be a fourteener, but more recent and accurate surveys have dropped it below that threshold.
Grizzly Peak is not only the name of Colorado's highest thirteener, but the state has four other Grizzly Peaks plus one Grizzly Mountain on the list: 
Grizzly Peak is themed around California's wilderness and national parks with particular references to Yosemite and Redwood national parks.
Its main attraction is Grizzly River Run, a Gold Rush-esque river rapids ride around the summit of Grizzly Peak.
Nearby is the Redwood Creek Challenge Trail; a playground area that includes a show featuring characters from Disney·Pixar's "Up".
A special entrance exclusive to guests of Disney's Grand Californian Hotel is located in this area.
There are also several restaurants in the Grizzly Peak district that are themed to California's farmland and heritage.
California-themed food and wine festivals are hosted in this area as well.
Big Grizzly Mountain Runaway Mine Cars (Traditional Chinese: 灰熊山極速礦車) is a steel roller coaster in the Grizzly Gulch section of Hong Kong Disneyland.
The attraction features Audio-Animatronic bears as well as a backwards section.
Big Grizzly Mountain is the second mountain and third roller coaster attraction at Hong Kong Disneyland. 
Since WAPA's Captain Jack-Olinda 500 kV wire rises to almost as the line crosses the rugged mountains near Grizzly Peak, that section of 500 kV line is bedecked with copious amounts of snow during the winter.
Despite its location far from the Pacific Ocean, of snow can accumulate near Grizzly Peak's -summit.
The extreme snowfall there can cause ice and snow to accumulate on the insulators and the wires and sometimes lead to power outages when the wires snap in these extreme conditions.
This high-elevation segment of 500 kV line is also said to be problematic. 
At the Magic Kingdom and at Disneyland, the ride is known by its full name of "Big Thunder Mountain Railroad".
The Tokyo and Paris versions would drop the word "Railroad" in favor of the name "Big Thunder Mountain".
Tokyo Disneyland's Big Thunder, which is almost identical to the Magic Kingdom's, opened in 1987, five years after the park opened.
At Magic Kingdom and Disneyland, the name of the ride is sometimes shortened to "Big Thunder Mountain", "Thunder Mountain Railroad", or even just "Thunder Mountain".
Imagineers rethought the attraction for Disneyland Paris, creating a layout mostly based on the Disneyland's Big Thunder Mountain Railroad but with several significant changes to both the layout and accompanying structure.
The revised European ride takes the form of a large island in the center of the Rivers of the Far West, accessed from its riverside station by tunnels underneath the water.
The attraction in Disneyland Paris is the only Big Thunder Mountain to have been an opening day attraction at the park.
Hong Kong Disneyland does not have a Big Thunder Mountain Railroad attraction (or a western-themed Frontierland, for that matter).
However, Grizzly Gulch has a theme similar to Frontierland.
The main attraction, Big Grizzly Mountain Runaway Mine Cars, carries a similar theme to Big Thunder Mountain Railroad.