Natural swimming hole
Mayfield Lake, Ike Kinswa State Park
Lake · 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
A reservoir on the Cowlitz River with swim beaches at Ike Kinswa State Park, set among old-growth cedars. The park's day-use area and campground make it a full-service summer swim destination for the Mossyrock side of Lewis County.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 70-75 in summer |
| Best season | June-September |
| Fees | Discover Pass |
| Reservations required | No |
| Hours | 8am-dusk |
| Parking | day-use and campground lots |
| Amenities | restrooms, campground, boat launch, picnic areas |
| County | Lewis County |
| Nearest town | Mossyrock |
| Safety notes | no lifeguard; boat traffic; reservoir levels fluctuate |
Map
Nearby swimming holes
Frequently asked questions
Can you swim in Mayfield Lake, Ike Kinswa State Park?
Yes — Mayfield Lake, Ike Kinswa State Park is listed as a natural swimming spot in Washington. Reported water temperature: 70-75 in summer. Heads-up: no lifeguard; boat traffic; reservoir levels fluctuate. There are rarely lifeguards at natural swimming holes — verify conditions locally before you go.
Does Mayfield Lake, Ike Kinswa State Park require reservations?
No reservations are required at Mayfield Lake, Ike Kinswa State Park based on current information — but verify before you go.
Is there a fee to visit Mayfield Lake, Ike Kinswa State Park?
Reported fee info: Discover Pass. Fees can change — confirm with the official link.
When is the best time to visit Mayfield Lake, Ike Kinswa State Park?
The best season is typically June-September.