🌤 Weather at Olallie State Park by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 33–59 °F | 46–71 °F | 36–64 °F | 31–42 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Cedar Lake, 3 mi away, elevation 1,560 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
🏆 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.
Keep exploring: The closest neighbors are Fort Townsend Historical SP (a short drive away) and Penrose State Park (a short drive away).
Camping reservations: Book campsites and cabins for Washington state parks online at washington.goingtocamp.com.
🐾 Dogs & Pets at Olallie State Park
- Pets allowed? statewide rule
- Pets are allowed in most Washington state parks but must be under physical control on a leash at all times.
- Leash rule statewide rule
- 8 ft maximum leash required; pets must be under physical control
- Beaches & swim areas statewide rule
- Pets are not permitted on designated swim beaches
- Cabins & lodging statewide rule
- Pets are not allowed inside vacation houses but are permitted in designated pet-friendly cabins and yurts (e.g. Grayland Beach, Seaquest, Ike Kinswa — Cape Disappointment does NOT allow pets in its yurts), typically up to two pets, with a pet fee
- Pet fees statewide rule
- No day-use pet fee; $15 per night pet fee in pet-friendly cabins/yurts
- Statewide exceptions statewide rule
- Director-designated off-leash areas are exempt from the leash rule and are conspicuously posted
Are dogs allowed at Olallie State Park?
Pets are allowed in most Washington state parks but must be under physical control on a leash at all times. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via parks.wa.gov. More: Washington state parks guide · Dog rules in all 50 states compared
Park Location
Plan your gear for Olallie State Park
From our editorial guides, matched to this park’s activities:
