Crater Lake National Park
Crater Lake National Park is in the Cascade Mountains of southern Oregon, about 180 miles (290 km) away from Portland. It’s known for its namesake Crater Lake, formed by the now-collapsed volcano, Mount Mazama. Crater Lake has been listed by the U.S. National Park Service’s Dark Sky Team as among the top 10 dark-sky locations in the National Park System, and the location was regularly visited by the renowned California telescope maker John Dobson. While there is no designated astronomy area, anyone can set up along the stops in the road. The park is open year-round to visitors and stargazers, 24 hours a day, but some facilities may close seasonally due to snow. “Far away from light pollution, and at a high elevation,” a stargazer told EarthSky.