Umatilla Rock - Monument Coulee
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. This rock would have been an island in the midst of swirling waters during the great floods. Today it offers a clear look at the multiple layers of geologic soils and rock that make up these lands. At the junction where the road splits (left to Dry Falls Lake, right to Camp Delany), head left along the gravel road at the southwestern base of Umatilla Rock. Stray off the road and hike cross-country through the open sage prairie and you might kick up a few squawking birds--pheasant and quail are very common here. In the first mile or so, you'll pass Perch Lake (good fishing for panfish--perch, sunfish, and crappie) and climb a small rise for views of the lake basin. The lake draws people though, so stick close to the hulky rock on your right to maintain your solitude and stay closer to the wildlife. Coyotes often establish dens near voids between fallen hunks of basalt at the base of the rock, and several species of birds nest in the area. Between the open cliff faces and the broad expanses of reeds along the lakeshores are ample nesting opportunities for swallows and flycatchers. After a couple miles, you'll pass the eastern edge of Dry Falls Lake. Turn east and cross through a gap in the coulee on the north side of Umatilla Rock. Here a trail heads up and through the gap/pass to drop you into Monument Coulee on the east side of Umatilla Rock. Turn south and follow the game trails south to Camp Delany. Then stick to the road to get back to your vehicle.
Driving Directions:
From Ellensburg, drive east on Interstate 90 to exit 151 (State Route 283, signed "Soap/Soap Lake"). Drive through Ephrata. At Soap Lake, turn north on State Route 17. Drive through Soap Lake, and 17 miles north of Soap Lake turn right into the Sun Lakes State Park. Continue along the park road. At 1.3 miles, turn left at the road (signed "Dry Falls Lake 3.0/Camp Delany 1.3/Deep Lake 3.0") that heads up into the coulee (gated in winter). Park off the road near the gate if it is locked (November through March) or continue up the paved road another mile and park at any available pullout. Recent Trip Reports
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Umatilla Rock - Monument Coulee
— Apr 12, 2013
— Fusslos
Day hike
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This is a great hike- dramatic rock areas. Can't believe we have not done it before as it is in Sun...
This is a great hike- dramatic rock areas. Can't believe we have not done it before as it is in Sun Lakes State Park. If the camp gate is closed and you cannot get in as they are using it for a function (true today) there is the trail right by the small parking area by the gate. Just go as you wish.
Some flowers- not many. Day hike
Features:
Wildflowers blooming
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Got to the trail head in the late (but sunny) afternoon. The trail was pretty well marked, except fo...
Got to the trail head in the late (but sunny) afternoon. The trail was pretty well marked, except for the part near Perch Lake, where you aren't suppose to go along the southern edge of the lake (and will have to go up a bit of terrain to get back on to the trail), but rather go along the north west (clock-wise) of the lake.
Nonetheless, it was a great hike. Getting up and down from Umatilla Rock was a slippery if you tried to stay on the beaten sandy path. Be careful and walk over the rocks/plants on the sides. Some hands were needed to stay steady. The most challenging part was getting over/through Umatilla Rock. Once you make it up the steep and slippery sides, you look pretty stuck on where to go from there (or at least it seemed so from my party). There are some pretty large rocks you can try to careful climb to chill for a snack and take in the view. Immediately at the top of the trail at the Rock, there is a narrow slip through the rock you can try to carefully climb down. It was maybe 10~ ft until you make it to the other side of the Rock, but it can be pretty daunting if you haven't done anything like that before. Loose falling rocks are always a concern, so make sure you give others their space before starting your descent. Now, the *easier*/*i-believe-more-official* way to get over the rock is westward (right) from where you end up after hiking up the rock on its northern side. It should be a very obvious *wide* opening in the rock, where you can start your (also careful) hike down the slippery sandy side. After we made it off the rock to finish off the hike, we once again, somehow missed a turn (the first one was along the lake) and ended up in the drive-way of the camp near by. Oh well! the trail should keep you parallel to the rock. No huge lost. Day hike
Issues:
Overgrown
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This is a great hike you go past 5 lakes in five miles. The trail is a bit hard to follow, got a bit...
This is a great hike you go past 5 lakes in five miles. The trail is a bit hard to follow, got a bit turned around and had to back track as we zig when we should have zag, but it was beautiful, all the rock with the lakes. It was hot today here 89 out, but it was windy so that helped. Only people on the trail. Werent able to post the pic of Mirror Lake, as only allows for 4 pic.
Day hike
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We car camped at Sun Lakes State Park near Coulee City over Memorial Day weekend. While the destinat...
We car camped at Sun Lakes State Park near Coulee City over Memorial Day weekend. While the destination was worth the drive, I don’t think we’ll ever attempt camping here over a holiday weekend again -- way too much partying going on. That said, the boozehounds were not interested in the many hiking opportunities in the park. We did two of the hikes from the Best Desert Hikes: Washington guidebook published by Mountaineers Books.
Umatilla Rock: I’m not sure we actually found the proper trail as described in the book, but we had fun regardless. Take the road to the left just after the second campground entrance, toward the Camp Delaney group camp. There’s a parking area for about five cars before the gate to the group camp. A faint trail leads from there through the camp, coming to a less than inviting barbed wire fence. The book shows a junction where you can continue the hike as a loop, but we were unable to spot it. We hiked up to the base of a basalt slope and climbed up a narrow path to the top of a cliff overlooking the Dry Falls valley. Although it was sunny when we started, rain forced us to turn back after our mini-scramble. Park Lake Side Canyon: There’s a large parking lot at the day use area, straight after the second campground entrance. Here, if the weather cooperates you can take a dip in Park Lake after the hike, or take a shower in any weather (bring some quarters!). The guidebook says that you can drive to the trailhead, but the paved road has been blocked off to allow only bike and foot traffic -- this adds about a mile of road walk at either end of the hike. The trail/jeep track starts at the second ‘No Vehicles After This Point’ sign, which also has an orange ‘Park Boundary’ sign next to it. There’s one steep section to get into the valley, but it’s mostly flat for the remainder of the hike. It’s obvious that the trail does see some motorized traffic, and target practice, and beer drinking. The trail continues through a valley with high basalt cliffs to either side. I spotted plenty of crows, robins, magpies, and even an eagle in the air. The only ground-bound creature was a hare near the beginning of the hike. About three miles in, the jeep track fades away and you can climb a basalt slope to a small lake protected by more barbed wire (easily walked around). Perhaps someone is protecting a favorite fishing hole! This is a good lunch and turnaround spot. Given the sage brush and loose basalt rock, I recommend long pants and over-the-ankle boots for any hikes in this area. As the summer progresses, you’ll need plenty of sunscreen and water as well -- by 10:00 a.m. the temperature in the valley was in the upper 70’s. Good side trips can be made to the Dry Falls Information Center (fabulous views down into the valley), additional State Parks along Banks Lake, Northrup Point, Lenore Lake and Caves, Soap Lake, and the Grand Coulee Dam. We were fortunate enough to catch not only the laser show at the dam, but also the season-opening fireworks put on by the town council. |
![]() Umatilla Rock - Monument Coulee. Photo copyright Alan Bauer.
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