Smith River Confluence located in Jedediah Redwoods State Park is a great swimming area especially from June to October. From the parking area for the boat launch, follow the trail back toward Nels Christensen Memorial Bridge (aka "Second Bridge").
A rope swing is usually attached to the bridge for added excitement at this swimming hole.
SAFETY:
There may be people jumping off rocks at this location. Know your limits and be sure to inspect the area below and under the water if you choose to jump. Additionally, the current can be running quickly in the late spring and early summer if the water is high. Exercise caution when going in for a dip.