Olallie State Park
🏆 Official Guide: Olallie State Park — A day-use Washington park along the I-90 corridor near North Bend — home to the iconic Twin Falls Trail through old-growth forest, connections to the Palouse to Cascades State Park Trail (Iron Horse Trail), Weeks Falls, and rock climbing crags just 45 minutes from Seattle.
Olallie State Park stretches along the South Fork of the Snoqualmie River near North Bend, Washington — a forested corridor of waterfalls, old-growth timber, and historic rail-trail. The park is best known for its Twin Falls Trail, one of the most popular waterfall hikes in the Seattle metro area, and its connection to the cross-state Palouse to Cascades Trail.
Visitor Information
| Detail | Information |
|---|---|
| Location | Near North Bend, WA — I-90 corridor |
| Type | Day-use only — closes at dusk |
| Pass Required | Washington Discover Pass |
| Distance from Seattle | ~45 minutes east via I-90 |
| Access Points | Twin Falls Trailhead + Homestead Valley Trailhead |
Trails
| Trail | Details |
|---|---|
| Twin Falls Trail | ~2.5 mi RT — moderate — old-growth forest to Lower & Upper Twin Falls |
| Palouse to Cascades Trail | Flat, gravel rail-trail — biking, walking, running |
| Weeks Falls | Short, easy trail near South Fork Picnic Area |
| Rock Climbing | Multiple crags — seasonal closures for falcon nesting |
Activities
| Activity | Details |
|---|---|
| Hiking | Waterfall trails + rail-trail — easy to moderate |
| Biking | Palouse to Cascades Trail — flat gravel surface |
| Rock Climbing | Multiple crags — check seasonal closures |
| Picnicking | South Fork Picnic Area near Weeks Falls |
| Wildlife | Old-growth forest birds, river wildlife |
Frequently Asked Questions
Can I camp at Olallie State Park?
No — Olallie is a day-use-only park that closes at dusk. For camping in the I-90 corridor area, consider Tinkham Campground or other national forest sites along the Middle Fork Snoqualmie.
How difficult is the Twin Falls Trail?
The Twin Falls Trail is rated moderate — about 2.5 miles round-trip with approximately 500 feet of elevation gain. The path is well-maintained with wooden boardwalks and stairs. It passes through stunning old-growth forest before reaching viewpoints of both the lower and upper falls.
