Cross Bay Swim

The current tugs at your stroke as you navigate the mid-channel of the Great South Bay, where the water feels distinctly cleaner than in decades past. Following the 2012 Hurricane Sandy, a significant breach at Old Inlet transformed the hydrology of this basin, forcing a tidal flush that finally cleared away nearly 75 years of nitrogen-heavy stagnation. This environmental shift has rejuvenated the local ecosystem, and as you push toward the distant shore of Brightwaters, you might spot the telltale triangular fins of horseshoe crabs patrolling the shallow sandy floor—a species that has inhabited these waters since the end of the last Ice Age. While modern internet folklore once conjured tales of eight-foot-long cryptid crabs rising from these depths, the reality is a far more serene encounter with the bay's natural inhabitants.

Race day and local heritage

This 5.5-mile crossing is the Maggie Fischer Memorial Cross Bay Swim, a tradition of endurance that dates back to 1927. The point-to-point journey begins near the Fire Island Lighthouse, a site steeped in local legend; lighthouse lore persists that the tower remains haunted by a keeper and his child, a tragic story often whispered by locals as you line up for the start. As you track the course toward Gilbert Park, you are essentially swimming past the maritime gateway to historic Long Island. The route parallels the Seatuck National Wildlife Refuge, where the tidal marshes provide a critical sanctuary for migratory waterfowl. If you find your pace lagging, remember that those who seek a different endurance challenge in these same coastal waters often look to the Nassau/Suffolk Long Island Open Water Swim for their next objective. The bay's historical gravity is anchored by the nearby Sagtikos Manor, a 1697 estate that served as a headquarters for British General Sir Henry Clinton during the American Revolution and later hosted George Washington. This swim demands a strict limit on participant numbers to ensure safety, reflecting the logistical complexity of managing a crossing that balances deep historical roots with the unpredictable currents of the Atlantic connection.