Twin Falls, Olallie State Park
Waterfall · Washington
ℹ️ Community-reported spot. Details below are compiled from public sources and are reported to be accurate — always verify locally before visiting.
About this swimming hole
Twin cascades on the South Fork Snoqualmie inside Olallie State Park, with riverside swim spots along the two-mile approach trail. Families favor the lower falls area for wading while the upper viewpoint rewards the full hike.
Good to know
| Water type | Waterfall |
|---|---|
| Water temperature | 50-55 in summer |
| Best season | July-September |
| Fees | Discover Pass |
| Reservations required | No |
| Hours | 8am-dusk |
| Parking | Olallie SP lot; limited; go weekdays |
| Amenities | vault toilet |
| County | King County |
| Nearest town | North Bend |
| Safety notes | no lifeguard; trail has steady incline; limited parking |
Map
Nearby swimming holes
Frequently asked questions
Does Twin Falls, Olallie State Park require reservations?
No reservations are required at Twin Falls, Olallie State Park based on current information — but verify before you go.
Is there a fee to visit Twin Falls, Olallie State Park?
Reported fee info: Discover Pass. Fees can change — confirm with the official link.
When is the best time to visit Twin Falls, Olallie State Park?
The best season is typically July-September.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026