Twin Falls run year-round for one very good reason: the area around North Bend receives more than 90 inches of rain each year. Seattle--just 35 miles west--gets half that much. The South Fork Snoqualmie River takes that massive amount of rainfall and puts it to use entertaining hikers. The river squeezes into a narrow rocky gorge before tumbling over a very impressive stairstep falls. Then, when the water has been churned into a frothy torrent, it plunges over a 150-foot rock wall, creating the stunning cascade of the Lower Twin Falls.
The first 0.7 mile of the trail pass through moss-laden forest along the shores of the South Fork Snoqualmie River. This flat mile provides kids plenty of opportunity to explore massive old nurse logs (fallen trees that act as nurseries for newly sprouted trees) and other interesting forest formations. Given the bounty of rain, and the lush forest growth, this area feels almost like an Olympic Peninsula rain forest--just without the massive cedars and hemlocks.
After this long, flat run the trail climbs gently up a series of long switchbacks. About 1 mile out, you'll find a short spur trail on the right--this leads to a fantastic overlook of the lower falls, the mighty 150-foot cascade. Back on the main trail, you'll continue to climb another 0.5 mile or so to a bridge that takes you over the river gorge, directly between two of the stairstep falls.
Snoqualmie Pass -- North Bend Area
Olallie State Park
Elevation Gain500 ft
Highest Point1000 ft
Good for kids
Discover Pass required
Guidebooks & Maps
Day Hiking: Snoqualmie Pass (Nelson & Bauer - Mountaineers Books)
Green Trails Rattlesnake Mountain/Upper Snoqualmie Valley No. 205S
From Seattle drive east on I-90 to exit 34. Turn south on 468th Avenue SE and proceed about 0.5 mile. Immediately before the South Fork Snoqualmie River bridge, turn left (east) on SE 159th Street and drive 0.5 mile to the trailhead parking lot at the road's end.
Locationsoutheast of North Bend, Washington
Number of drops1
WatercourseSouth Fork of Snoqualmie River
Twin Falls is a waterfall on the South fork of the Snoqualmie River, off exit 34 on I-90 in the Olallie State Park. Twin Falls features a well-hidden underground run-of-the-river hydroelectric project that generates 24 MW of electricity. The powerhouse is located 325 feet below ground.
Olallie State Park
Middle Twin Falls
Upper Twin Falls
Jump up ^ "Twin Falls". Geographic Names Information System, U.S. Geological Survey.
Jump up ^ "Twin Falls (Waterfalls of the Pacific Northwest)".
Jump up ^ "Twin Falls Hydroelectric Project".
Olallie State Park, Washington State Parks
Photo of Twin Falls and the trail to it, with a description of trail conditions
Twin Falls Trail - Olallie State Park
Enjoy an easy hike through the Cascade foothills to a beautiful set of waterfalls, only 30 minutes from downtown Seattle
Overview: This popular trail follows the South Fork of the Snoqualmie River through the rainforests along the western edge of the Cascade Mountains. The trail provides spectacular views of Twin Falls. Most people park at the Twin Falls Trailhead located off of Exit 34 on I-90. A little over a mile from the trailhead, a set of stairs descends to a viewpoint of the Lower Falls as they plunge over a 150 foot cliff. Hike another quarter mile to a bridge that spans the narrow Twin Falls canyon. From the bridge you can see several plunge pools of the Upper Falls upstream and the edge of the Lower Falls downstream. Less than a quarter mile from the bridge is a view of the Upper Falls from above. Most visitors turn around at this point as the trail starts climbing steeply. Those hearty enough to continue will find that, the trail intersects with the John Wayne Pioneer Trail in a little under a mile. The John Wayne Pioneer Trail is a 108 mile long trail that follows the old Chicago-Milwaukee-St. Paul-Pacific Railroad from Cedar Falls to Vantage. Hike east along the Pioneer Trail for a quarter mile to reach the Olallie State Park Homestead Valley Trailhead (located off I-90 Exit 38).
Tips: Discover Pass is required.
Dogs on leash.
Avoid the summer crowds by visiting on a weekday.
Parking at the trailhead is limited.
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Length: 2.7 miles / 4.3 km
Duration: 1-3 hours
Family Friendly • Dog Friendly