The spring is 1 mi N. of U.S. Hwy 41 and 2 mi E. of the Myakka River. Warm Mineral Springs has also been known as Warm Salt Spring, Salt Spring, and Big Salt Spring. Oblique aerial photograph of Warm Mineral Springs from an altitude of 1,000 feet, April 1978. The area surrounding Warm Mineral Springs is flat and about 10 ft above mean sea level. The soil is sandy and vegetative cover is sparse.
Limestone crops out at the edge of the spring pool.
The water is salty and has a sulfurous odor and taste. The spring pool has a surface diameter of about 250 feet, and water-surface elevation is about 6 ft above mean sea level. The bottom of the pool slopes gently to a depth of 17 ft, about 40 ft from shore, and then drops off sharply to a debris cone and depths of 124 ft to more than 200 ft below water surface. A cave or recessed area containing large stalactites underlines a 43-ft ledge that extends around the full perimeter of what originated as a sink owing to collapse of a cavern in the Tampa Limestone. This 170-ft diameter opening is the orifice of Warm Mineral Springs.