In 2010 the first five quarters were released. I haven't personally seen any, but supposedly they are out there. These included designs honoring the Hot Springs National Park (Arkansas), Yellowstone National Park (Wyoming), Yosemite National Park (California), Grand Canyon National Park (Arizona) and Mount Hood National Forest (Oregon).
Today the United States Mint released the design for the Olympic National Park quarter that will be released in 2011. The image is to the right.
The quarter design shows a Roosevelt elk standing in the Hoh River with a view of Mount Olympus behind it.
The other four quarters to be released in 2011 will be designs honoring Gettysburg National Military Park (Pennsylvania), Glacier National Park (Montana), Vicksburg National Military Park (Mississippi) and Chickasaw National Recreation Area (Oklahoma).
According to the United States Mint, the quarters program is a multi-year initiative during which the United States Mint will issue 56 circulating quarter-dollar coins with reverse designs emblematic of a national park or other national site in each state, the District of Columbia and the five U.S. territories – the Commonwealth of Puerto Rico, Guam, American Samoa, the United States Virgin Islands and the Commonwealth of the Northern Mariana Islands.
The quarters are being released in the order in which the featured site was first established as a national park or site. The designs will rotate five times each year through 2020, with the final coin being released in 2021.