I suggest the 7-mile Tam-a-láu Trail loop hike near Lake Billy Chinook. It features a mile-long climb to the top of a lava plateau called the Peninsula, which separates the Deschutes River and Crooked River arms of Lake Billy Chinook. Hikers are treated to bird’s-eye views of the reservoir and the dramatic cliffs and plateaus that line the water. The hike starts at the Cove Palisades State Park Upper Deschutes Trailhead. Enjoy!