Renowned for its glorious waterfalls, Olallie State Park is a great place to kick off the hiking season. Moderate trails lead to the popular Twin Falls, the smaller Weeks Falls and other cascading water falls, or past the remains of a massive landslide to Cedar Butte.
Hikers looking for a bigger challenge can try the 8.5-mile hike up 3,300 feet to Dirty Harry’s Peak -- or stop at the 4-mile, 1,300-foot mark and gaze out over Dirty Harry’s Balcony. Rock climbers will find days of activities in four different cliff areas, on routes with technical ratings of 5.5 to 5.13b.
Long-distance hikers and cyclists can reach the John Wayne Pioneer Trail (and an exciting new mountain bike trail, opening in summer 2017) from the Cedar Falls trailhead. Anglers find rewarding fishing on the South Fork of the Snoqualmie River.
This large day-use park is within 45 minutes of Seattle and lies on the western slopes of the Cascade Mountains, along both sides of I-90. The park has several trailheads and offers a quintessential Washington landscape of powerful falls, lush forest, soaring cliffs, sweeping views and a rushing river. If you’re looking for a break from the city without the long drive, Olallie is your destination.
Olallie State Park is a 2,336-acre day-use park east of Seattle. The park offers 6 miles of moderate hiking trails, excellent fishing, interesting cliffs, local rock climbing opportunities and access to the long distance, mixed-use Iron Horse State Park Trail.
Automated pay station: This park is equipped with an automated pay station for visitors to purchase a one-day or annual Discover Pass.
The park offers a total of 11 picnic tables in two picnic areas at the South Fork Picnic Area. All are available first come, first served.
0.1 miles of ADA hiking trails
6 miles of hiking trails
Water Activities & Features
Other Activities & Features
An interpretive trail at the South Fork Picnic Area passes through a small grove of old-growth trees. Interpretive signage provides visitors with information about the Snoqualmie Wagon Road, the first road to run from Ellensburg to Seattle in the 1800s.
The rock-climbing area is adjacent to the park, above the Iron Horse Trail. Rock-climbing equipment is necessary. Fatal accidents have occurred when amateurs have climbed without proper equipment.
Olallie provides access to the Iron Horse Trail, an old Milwaukee Railroad path that starts in North Bend and extends to the Idaho border. The Iron Horse Trail permits mountain biking and horseback riding.
The river is seasonally open for fishing.
A recreational license is required for fishing and shellfish harvesting at Washington state parks. For regulations, fishing season information, or to purchase a recreational license, visit the Washington Department of Fish and Wildlife.
Kayaking only is allowed downstream of Twin Falls.
In 1950, Puget Sound Power and Light Company sold 160-acres along the South Fork of the Snoqualmie River, including Twin Falls, to Washington State Parks and Recreation Commission. At that time, an informal trail led from a roadside rest area on the Snoqualmie Pass Highway to Twin Falls. The area was officially named Twin Falls State Park in 1974. Later in 1976, 210-acres to the east of the park were added. The park was then renamed Olallie State Park in 1977 for the Chinook Jargon word for berry, which was chosen due to the abundance of huckleberries in the area. Around this time, Interstate 90 was built and the rest area and trail to Trail Falls eliminated.
In the early 1980s, State Parks was approached by a private company interested in constructing two hydroelectric plants in the park, one at Weeks Falls and the other at Twin Falls. After a public planning process, the hydroelectric plant plans were modified to reduce the impact on local fish and retain the scenic aspects of the falls. Construction of the two power plants was completed in 1990. To mitigate the aspect impacts of the plants, a new trail from the west end of the park to Twin Falls was constructed.
The park grew to include the northern slopes of Mount Washington in the 1990s and is now more than 2,500-acres in size.
Cedar Falls Trailhead
The western terminus of Iron Horse State Park, the Cedar Falls Trailhead provides access to the 108-mile John Wayne Pioneer Trail and is the most popular route to the 1.5-mile Cedar Butte Trail in Olallie State Park. This family friendly trail provides a gentle hike to the 1,870-foot summit of Cedar Butte. The trail features views of the Boxley Blowout, a crater left in the hillside where a giant landslide and flood destroyed the downstream town of Edgewick in 1918.
Far Side Trailhead
The Far Side Trailhead provides hikers and rock climbers access to trails and crags in the Middle Fork Natural Resource Conservation Area. Visitors may hike along the 4.25-mile Dirty Harry’s Peak Trail to the 4,680-foot summit. From atop Dirty Harry’s Peak, visitors may take in views of the Upper Snoqualmie Valley to the west and the Alpine Lakes Wilderness Area to the east. Rock climbers have access to six separate climbing areas that range in difficulty from 5.5 to 5.12c.
Homestead Valley Trailhead
The Homestead Valley Trailhead provides access to a variety of outdoor pursuits. Hikers can use the John Wayne Pioneer Trail to access the east end of the Twin Falls Trail. Rock climbers can access the Deception Crags and the Mount Washington climbing areas which offer more than 100 routes that range in difficulty from 5.6 to 5.13b. The trailhead is often used as the end point for mountain bikers riding the John Wayne Pioneer Trail from the Hyak Trailhead through the 2.3-mile Snoqualmie Pass Tunnel and then another 12 miles downhill to Olallie.
South Fork Fishing Access
A small trailhead, the South Fork Fishing Access provides fishermen access to the north riverbank of the Snoqualmie River’s South Fork. Rainbow trout, cutthroat trout, and whitefish are the most abundant species of fish found in the South Fork.
South Fork Picnic Area
The South Fork Picnic Area has two separate picnic areas, one next to the Hall Creek Play Field and the other along the riverside of the Snoqualmie River’s South Fork and an interpretive trail. Both picnic areas have picnic tables and barbecue grills available at a first-come, first-served basis. The Snoqualmie Wagon Road Interpretive Trail starts near the riverside picnic area and passes through a small grove of old growth trees to Weeks Falls. Interpretive signs tell the story of the Snoqualmie Wagon Road, the first road that ran from Ellensburg to Seattle in the late 1800s. The South Fork Picnic Area is also provides river access for fishermen.
Twin Falls Trailhead
The Twin Falls Trail follows the South Fork of the Snoqualmie River through the rainforest along the western slopes of the Cascade Mountains. The trail is best known for viewpoints of Twin Falls. A little over a mile from the trailhead, a set of stairs descend to a viewpoint of the Lower Falls as they plunge over a 135-foot cliff. Hike another quarter-mile to a bridge that spans the narrow Twin Falls canyon for a view of the Upper Falls. The trail continues another mile where it intersects with the John Wayne Pioneer Trail. The Twin Falls Trailhead is also a popular river access point for fishermen and put-in for kayakers.