For those looking to retreat into the rugged beauty of Oregon, Crater Lake-Klamath is a dream location. Crater Lake was created after the eruption of volcanic Mount Mazama over 7000 years ago. Each year, thousands of visitors are drawn to Crater Lake National Park featuring the lake in the middle of a crater that is over 6 mi (10 km) wide. Guests of the park enjoy driving around the scenic rim of the crater, boating, camping and hiking in the summer, while the winter affords cross-country skiing opportunities. The Klamath Country Fairgrounds & Event Center hosts exhibitons, events, rodeos and concerts in the area, including the Klamath County Fair & Carnival. On the shore of Upper Klamath Lake, Klamath Falls provides a perfect base for birdwatching, whitewater rafting and spelunking. Also in Klamath Falls, golfers appreciate the Running Y Resort Golf Course, the only Arnold Palmer-designed course in the state.