Mud Spring USA

Embark on a journey of discovery as we delve into the intriguing world of Mud Spring, a captivating aquatic wonder that has also gone by the names Sulfur Spring and Mud River Spring. Drawing inspiration from the Florida Geological Survey Bulletin 31, we invite you to unravel the mysteries of this unique spring nestled in a remarkable landscape.

  • Region: Florida
  • Coordinates: 28.546351, -82.625388
  • Depth: 210 ft
  • Remarks:
  • Type: Cave, Cavern

Mud Spring, with its historical monikers, finds its home at the head of Mud River. Positioned approximately 400 feet south of State Hwy 50, this enchanting spring boasts a strategic location just 1.3 miles east of Bayport. Furthermore, it stands a mere 3,000 feet west of the intersection where State Hwys 50 and 595 converge.

Head Pool and Run Dimensions

The head pool of Mud River, a key feature of Mud Spring’s allure, spans an impressive 400 feet in diameter. Flowing gracefully from the eastern side, a run measuring 200 feet in width adds to the spring’s visual splendor.

Striking Spring Basin

Situated in proximity to the southwest side of the pool, Mud Spring exudes an undeniable charm. Positioned merely 15 feet east of a dock, the spring basin stretches elongated in a north-south orientation. The basin’s contours slope irregularly on the northern, eastern, and southern sides. A distinct vertical descent characterizes the western side, extending to a remarkable depth of 185 feet as documented in Sinclair’s 1977 study (Table 2).

Underwater Currents and Obscured Depths

Divers have reported encountering a horizontal westward current flowing at an impressive speed of 3 miles per hour at a depth of 50 feet. The riverbed’s bottom is cloaked in a unique brown flaky substance, likely algae-related, contributing to the spring’s epithet “Mud.”

Dynamic Discharge and Water Quality

Tidal influences play a role in Mud Spring’s aquatic rhythm. Historical measurements reveal discharge rates of 128 ft³/s on January 18, 1961, and varying rates of 101 ft³/s and 83.1 ft³/s during changing tides on December 11, 1975. Water quality indicators, including a chloride content of 8,000 mg/L based on a specific conductance of 23,000 micromhos/cm, along with a temperature of 20.5°C (69°F) on December 16, 1960, provide insights into the spring’s unique composition.

Recreational Oasis

Mud Spring not only captivates with its natural charm but also serves as a destination for recreational activities. Serving as a fishing and boat launching site, it offers enthusiasts an opportunity to immerse themselves in its serene beauty.

In conclusion, Mud Spring stands as a testament to the wonders of nature. From its intriguing origins to its diverse aquatic features, this natural marvel invites exploration and contemplation. Inspired by the insights of Florida Geological Survey Bulletin 31, Mud Spring remains an enchanting destination where history and natural beauty intertwine to create an unforgettable experience.


How deep is Mud Spring’s cave?

Mud Spring’s cave extends to a depth of 210 feet on its west side, creating a unique underwater landscape.

Can I experience diving at Mud Spring as a beginner?

Diving at Mud Spring is best suited for experienced divers due to its complex currents and varying depths.

What is the water quality at Mud Spring like?

Mud Spring’s water quality features a chloride content of 8,000 mg/L and a temperature of around 20.5°C (69°F), creating a distinctive aquatic environment.

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