The Umatilla Rock Trail in Sun Lakes-Dry Falls State Park, which is such an interesting park to explore, is a 2.7 mile long loop that takes you around around the rock. The rock stands 1,535 feet tall and the trail makes a brief scramble up the hillside to cut through a pass. From this pass you'll want to take a moment to capture all the loveliness spread out before you. If you are into geology, the park is a wonderland. The campground is awesome as well, and it is kind of a trip to realize you are literally camping on land scoured out by the Ice Age Floods. It was interesting to learn about how the coulees were formed. The scenery is beautiful here and the highlights besides Umatilla Rock include Perch Lake, Dry Falls Lake, Red Alkali Lake, Green Lake, barren eastern Washington desert, and Dry Falls. When I visited it was a really pretty day for a rock hike! The caves at the park are fun to explore, too.