Natural swimming hole
Lewiston Lake (Ackerman)
Lake · California
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
Lewiston Lake is a small, calm reservoir on the Trinity River known for its swim beach at Ackerman Campground. No-wake rules keep the water glassy and safe for swimmers. The lakeside setting under the Trinity Alps is peaceful and family-friendly.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 60s-70s in summer |
| Depth | swim beach at Ackerman |
| Best season | June-September |
| Fees | Free |
| Reservations required | No |
| Parking | campground and day-use lots |
| Amenities | restrooms, picnic tables, campground, boat launch |
| County | Trinity County |
| Nearest town | Lewiston |
| Safety notes | no lifeguard; no-wake lake — safer for swimmers |
Map
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Frequently asked questions
Can you swim in Lewiston Lake (Ackerman)?
Yes — Lewiston Lake (Ackerman) is listed as a natural swimming spot in California. Reported water temperature: 60s-70s in summer. Heads-up: no lifeguard; no-wake lake — safer for swimmers. There are rarely lifeguards at natural swimming holes — verify conditions locally before you go.
Does Lewiston Lake (Ackerman) require reservations?
No reservations are required at Lewiston Lake (Ackerman) based on current information — but verify before you go.
Is there a fee to visit Lewiston Lake (Ackerman)?
Reported fee info: Free. Fees can change — confirm with the official link.
When is the best time to visit Lewiston Lake (Ackerman)?
The best season is typically June-September.