The Diamond Craters Oval Crater is a geological site in the Donner Und Blitzen watershed of Oregon. It is a large, oval-shaped volcanic crater that was formed by an eruption between 7,000 and 30,000 years ago. The crater is approximately 3,900 feet long and 2,800 feet wide, with a depth of around 400 feet. The site is known for its unique geology, including lava flows, cinder cones, and other volcanic features. Visitors to the Diamond Craters Oval Crater can go on guided tours, hiking, and camping trips to explore the area's natural beauty.

One of the main reasons to visit the Diamond Craters Oval Crater is to witness the unique geological features of the area. The site offers visitors a chance to hike through lava fields, explore cinder cones, and see other volcanic formations. The Diamond Craters Oval Crater is also a popular spot for camping and stargazing, with opportunities to see the Milky Way and other celestial objects. Additionally, visitors can learn about the area's history and geology through guided tours and interpretive exhibits. Overall, the Diamond Craters Oval Crater is a must-visit destination for anyone interested in geology, natural beauty, and outdoor recreation.