Natural swimming hole
Denny Creek natural waterslides
Creek · Washington
About this swimming hole
A series of smooth granite slabs on Denny Creek where clear, chilly water runs into natural waterslides and shallow pools. Families stop at the slide rocks about a mile in from the trailhead, making it the I-90 corridor's most famous family swim hike.
Good to know
| Water type | Creek |
|---|---|
| Water temperature | 45-50 in summer |
| Depth | shallow slide pools |
| Best season | July-September |
| Fees | NW Forest Pass or day-use fee |
| Reservations required | No |
| Hours | daylight hours |
| Parking | Denny Creek/Franklin Falls trailhead; fills by mid-morning |
| County | King County |
| Nearest town | Snoqualmie Pass |
| Safety notes | no lifeguard; swift frigid current; creek crossing bridge washed out — ford carefully |
Map
Official information
Official park / agency page ↗ — check current conditions, fees, and reservations here before you go.
Nearby swimming holes
Frequently asked questions
Can you swim in Denny Creek natural waterslides?
Yes — Denny Creek natural waterslides is listed as a natural swimming spot in Washington. Reported water temperature: 45-50 in summer. Heads-up: no lifeguard; swift frigid current; creek crossing bridge washed out — ford carefully. There are rarely lifeguards at natural swimming holes — verify conditions locally before you go.
Does Denny Creek natural waterslides require reservations?
No reservations are required at Denny Creek natural waterslides based on current information — but verify before you go.
Is there a fee to visit Denny Creek natural waterslides?
Reported fee info: NW Forest Pass or day-use fee. Fees can change — confirm with the official link.
When is the best time to visit Denny Creek natural waterslides?
The best season is typically July-September.