Silver Glen Springs
Location: Marion County, Florida, United States
Crystal-Clear Waters, Ancient History, and Hidden Passages
Located within the Ocala National Forest, Silver Glen Springs is one of Florida’s most remarkable first-magnitude springs. Known for its crystal-clear water, rich archaeological history, and hidden underwater cave system, the spring has attracted both people and wildlife for thousands of years.
Today, visitors come to swim, snorkel, picnic, and enjoy the spring’s beautiful setting along the western shore of Lake George. Beneath the surface, however, lies an entirely different world. A complex underwater cave system explored only by a handful of cave divers under special permit.
Silver Glen Springs offers a rare opportunity to experience Florida’s natural, archaeological, and geological history in one location.
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Silver Glen Run provides direct access to Lake George, making the spring a popular stop for boaters traveling the St. Johns River.
Boats are permitted within the spring run but are prohibited from entering the main swimming basin, helping maintain a safe environment for swimmers and snorkelers.
Kayakers and canoeists can also explore the spring run while enjoying views of the surrounding forest and abundant wildlife.
Geological Context
Silver Glen Springs is a first-magnitude spring located within the Ocala National Forest and the Middle St. Johns River Basin. Groundwater from the Floridan Aquifer emerges through limestone openings before filling the spring basin and flowing through Silver Glen Run into nearby Lake George, the second-largest lake in Florida.
The spring’s constant flow maintains exceptional water clarity and a year-round temperature of approximately 72°F, creating ideal habitat for fish and other aquatic life while supporting one of the region’s most popular recreation areas.
- Visit early in the morning to enjoy the clearest water and fewer crowds.
- Stay within the designated swimming area, as boats use the spring run outside the roped boundaries.
- Walk the interpretive trails to learn about the area’s Native American history and unique geology.
- Please do not disturb or remove archaeological artifacts or shells from the site.
- If arriving by boat from Lake George, be mindful of the no-boat zone surrounding the swimming area.
The Spring
Silver Glen Springs consists of a broad spring basin with brilliant blue-green water surrounded by hardwood forest and native vegetation.
Swimming and snorkeling are permitted within designated roped-off areas, allowing visitors to safely enjoy the spring while protecting sensitive underwater features.
Outside the swimming area, Silver Glen Run carries the spring’s crystal-clear water a short distance into Lake George, creating a popular destination for boaters exploring the St. Johns River system.
Archaeological Significance
Silver Glen Springs is one of the most important archaeological sites in Central Florida. Large Native American shell middens, sometimes referred to as shell mounds or trash mounds, surround portions of the spring. These deposits accumulated over thousands of years as Indigenous peoples repeatedly visited the spring for food, fresh water, and shelter.
During excavations in the 1930s, resort operators uncovered ancient pottery, stone tools, and other artifacts preserved within the shell middens. Archaeologists also discovered human remains embedded within the surrounding limestone dating back approximately 500 to 700 years, along with skeletal remains from even earlier periods.
Evidence of Florida’s Ice Age has also been uncovered at Silver Glen Springs. Mastodon teeth and portions of tusks recovered from the spring basin provide a glimpse into a time when prehistoric mammals roamed the region thousands of years before humans arrived.
Today, the archaeological resources surrounding the spring remain protected, preserving one of Florida’s richest cultural landscapes.
Hydrological Characteristics
As a first-magnitude spring, Silver Glen Springs discharges tens of millions of gallons of groundwater each day into Silver Glen Run before entering Lake George. This steady flow helps maintain water quality within the Middle St. Johns River Basin while supporting both aquatic ecosystems and recreational opportunities. The spring also illustrates the intimate connection between Florida’s groundwater, lakes, and river systems.
Recreation
Silver Glen Springs is a favorite destination for swimming, snorkeling, picnicking, and relaxing in the Ocala National Forest. The designated swimming area provides excellent visibility and refreshing water throughout the year, while picnic tables and charcoal grills make the spring an ideal location for family outings.
Interpretive walking trails allow visitors to learn about the area’s natural history and archaeological significance while exploring the surrounding forest.
Hidden beneath Silver Glen Springs lies an extensive underwater cave system that has been actively explored and mapped by cave divers.
Unlike most Florida spring caves, access is highly restricted. Special permits are required to dive the system, and recreational cave diving is not permitted.
The primary entrance is a nearly vertical shaft known as the Natural Well. At the bottom of this chimney-like opening, divers enter a complex network of tunnels and large rooms extending beneath the surrounding landscape.
Among the best-known features is the Aussum Pit, a massive underwater chamber that has become one of the signature features of the cave system.
Significant exploration and mapping have been conducted by Eric Hutcheson and members of Karst Underwater Research (KUR) operating under special permits.
Although the cave remains inaccessible to the public, it represents one of Florida’s most significant submerged karst systems and continues to contribute to our understanding of the Floridan Aquifer.
Wildlife
Silver Glen Springs supports an abundance of aquatic and terrestrial wildlife. Visitors frequently observe schools of freshwater fish, turtles, wading birds, osprey, and other native species throughout the spring and surrounding forest.
The spring’s constant temperature and clear water create ideal habitat for numerous aquatic organisms, while the surrounding hardwood hammock supports a diverse array of birds and mammals.
Current Status
Silver Glen Springs is managed by the U.S. Forest Service as part of the Ocala National Forest. Swimming, snorkeling, boating, hiking, and picnicking remain popular recreational activities.
Scuba diving is prohibited within the recreational spring, and entry into the underwater cave system is restricted to authorized exploration teams operating under special permit.
Visitors are encouraged to remain within designated swimming areas and help preserve both the archaeological resources and natural beauty of this remarkable spring.
The Hidden Rivers of Florida documents the springs, rivers, sinkholes, caves, and groundwater systems that shape Florida’s landscape. Through exploration, photography, research, and firsthand observation, the project seeks to connect visitors with the hidden waterways flowing beneath the state.
Frequently Asked Questions
Silver Glen Springs is located within the Ocala National Forest on the western shore of Lake George in Central Florida.
Yes. Swimming and snorkeling are permitted within designated roped-off areas.
No. Recreational scuba diving is prohibited.
Yes. Silver Glen Springs contains an extensive underwater cave system that has been explored and mapped under special permits. Recreational access is not permitted.
The Natural Well is the primary entrance to the underwater cave system. It is a deep, vertical shaft leading to a network of tunnels and chambers beneath the spring.
The Aussum Pit is one of the largest and best-known rooms within the Silver Glen Springs cave system.
Ancient Native American shell middens, pottery, tools, human remains, and Ice Age mastodon fossils have all been discovered at the spring, making it one of Florida’s most significant archaeological sites.
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