Olallie State Park

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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. 

Park features

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.  

  1. Activities
  2. History
  3. Maps
  4. Trailheads
ADA Amenities/Facilities
  • Restroom
  • Hiking trail
Picnic & Day-Use Facilities
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
  • Freshwater fishing
Other Activities & Features
  • Bird watching
  • Mountain biking
  • Rock climbing
  • Wildlife viewing
Interpretive Opportunities
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.
Additional Information
  • 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.