Based on the provided reference, the direct answer is no, you generally cannot swim at Johnson Canyon, particularly in the waterfall areas.
What the Reference Indicates
The reference highlights a specific experience at the lower falls: "Upon arriving at the lower falls you can enter a cave and go right up to the base of the waterfall." Crucially, it then clarifies the extent of water interaction permitted by stating, "This is as close as you can get to swimming in a waterfall."
This phrasing strongly implies that actual swimming in the waterfall pool or the surrounding area is not allowed, and the experience of getting close to the water's base within the cave is presented as the nearest alternative to swimming.
Experiencing Johnson Canyon
While swimming may not be an option at the falls themselves according to the reference, visitors can still enjoy the natural beauty and unique geological features. The opportunity to enter a cave and stand near the base of the lower falls offers a memorable interaction with the environment without entering the water for swimming.
- Explore the cave structure at the lower falls.
- Experience the power and mist of the waterfall from a close vantage point.
- Enjoy the scenic views along the hike to the falls.
This guided experience within the cave is explicitly stated as the closest activity resembling swimming in the waterfall area.
