Natural swimming hole
Twin Falls, Olallie State Park
Waterfall · Washington
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
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Frequently asked questions
Can you swim in Twin Falls, Olallie State Park?
Yes — Twin Falls, Olallie State Park is listed as a natural swimming spot in Washington. Reported water temperature: 50-55 in summer. Heads-up: no lifeguard; trail has steady incline; limited parking. There are rarely lifeguards at natural swimming holes — verify conditions locally before you go.
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.