Saint Martins Reefs is part of the larger St. Martins Marsh Aquatic Preserve, a coastal estuarine system along the coast of Citrus County, Florida, situated between Crystal River to the north and Homosassa to the south. The preserve extends westward from the shoreline, encompassing a chain of islands known as the St. Martins Keys and featuring salt marshes, tidal creeks, seagrass beds, hardbottom habitat, and mangroves. This creates a complex and protected network of waterways ideal for kayaking and canoeing. The area is open 24/7, though access is dependent on public boat ramps managed by other entities. Key public access points for paddlers include Fort Island Gulf Beach, Fort Island Trail Park, Ozello Community Park, Crystal River Preserve State Park, the Duncan J. MacRae Public Boat Ramp at MacRae's of Homosassa, Ozello Fishing Pier and Park, the Crystal River City Boat Ramp, and Pete's Pier Boat Ramp. The aquatic preserve program itself offers no on-site facilities, so paddlers must check each specific launch location for available amenities like parking. The rich coastal ecosystems provide critical habitat for manatees, fish, and migratory birds, making wildlife viewing a significant part of the paddling experience. The preserve staff conducts long-term water quality monitoring in the area, including continuous monitoring off the Homosassa River, which suggests an active management focus on environmental health. The overall character is that of a shallow, biologically diverse estuary where paddlers can explore sheltered mangrove islands and extensive seagrass flats.