Natural swimming hole
Big Rock (Trinity River)
River · 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
Big Rock is a popular Forest Service river access on the Trinity just north of Willow Creek, with picnic tables, toilets, and easy entry to the water. Locals treat it as the go-to after-work swim spot when the valley heats up. The setting is classic Trinity canyon — steep forested slopes and clear green water.
Good to know
| Water type | River |
|---|---|
| Water temperature | 60s in summer |
| Depth | river pools at the access |
| Best season | July-September |
| Fees | Free |
| Reservations required | No |
| Parking | Forest Service lot with marked river access |
| Amenities | picnic tables, vault toilets |
| County | Humboldt County |
| Nearest town | Willow Creek |
| Safety notes | no lifeguard; cold swift water; watch for poison oak on banks |
Map
Nearby swimming holes
Frequently asked questions
Can you swim in Big Rock (Trinity River)?
Yes — Big Rock (Trinity River) is listed as a natural swimming spot in California. Reported water temperature: 60s in summer. Heads-up: no lifeguard; cold swift water; watch for poison oak on banks. There are rarely lifeguards at natural swimming holes — verify conditions locally before you go.
Does Big Rock (Trinity River) require reservations?
No reservations are required at Big Rock (Trinity River) based on current information — but verify before you go.
Is there a fee to visit Big Rock (Trinity River)?
Reported fee info: Free. Fees can change — confirm with the official link.
When is the best time to visit Big Rock (Trinity River)?
The best season is typically July-September.