Umatilla Rock / Monument Coulee

Coulee City, Washington 99115

Umatilla Rock / Monument Coulee

Umatilla Rock / Monument Coulee Professional Review and Guide

"Dry Falls was once the world’s largest (in water volume) waterfall in the world, but that was during the Great Missoula Floods at the end of the last Ice Age. Today the falls is a massive cirque of basalt: Dry Falls Lake. Dry water channels from the Banks Lake area slide south to the lip of the falls, and then the land falls away in great basaltic cliffs.

What was once an ancient splash pool at the base of the falls is now a broad desert meadow dotted with lakes and ponds, swarming with birds and animals of all kinds, shapes, and sizes. This is a uniquely beautiful area to explore, both to delve into the geologic history of the area and to reach out and touch the native flora and fauna of the Washington desert. Umatilla Rock towers like a giant fin in the middle of Grand Coulee in the basin below Dry Falls."

Umatilla Rock / Monument Coulee Reviews

5 out of 5 stars5 out of 5 stars5 out of 5 stars5 out of 5 stars5 out of 5 stars
icon1 Total
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.

Umatilla Rock / Monument Coulee Photos

Help others discover amazing sights!

Trail Information

Coulee City
Nearby City
Trail Type
Skill Level
3 hours
April through July
1,200 feet
Trailhead Elevation
1,300 feet
Top Elevation
Washington State Parks and Recreation
Local Contacts
Washington State Department of Natural Resources (DNR) Banks Lake
Local Maps

Activity Feed

Jul 2018