About Big Flat
Big Flat is a serene cold spring nestled along the Trinity River in Northern California. This primitive swimming hole captivates with its cool, clear water and striking rock formations, offering a refreshing escape surrounded by natural beauty. The tranquil atmosphere invites you to unwind on sandy beaches beside the flowing river.
Getting There
To reach Big Flat, drive west on California Route 299 from Helena. Just past the small community of Big Flat, look for a sign on the right indicating a "Turn out to allow passing." Park in the spacious lot on the south side of the road. From there, a brief 5-minute path leads down to the riverbank and the inviting sandy swim spot.
What to Expect
At Big Flat, the water remains refreshingly cold throughout the summer, ideal for cooling off on warm days. The area stays quiet and uncrowded, allowing you to soak in the surroundings in peaceful solitude. Facilities are minimal, emphasizing an authentic and primitive outdoor experience with natural rock formations shaping the swimming area.
Tips for Visitors
Visit Big Flat during summer for the warmest weather and calm river conditions. Bring sturdy shoes for the short walk down to the water and pack out all trash to keep the site pristine. There are no fees or amenities, so prepare accordingly for a self-sufficient day at one of California’s tranquil swimming holes.