The Saint Marys River is a scenic waterway that originates in the Okefenokee Swamp and flows approximately 126 miles eastward, forming much of the border between southeast Georgia and northeast Florida before emptying into the Atlantic Ocean. This blackwater river system drains a watershed of about 1,300 square miles.

Paddling opportunities on the Saint Marys range from multi-day wilderness trips to shorter day paddles. The river offers a variety of experiences, from narrow, twisting upper sections to wider, more leisurely lower stretches. The full river trip from the Okefenokee to St. Marys, Georgia covers about 72.4 miles and typically takes 3-4 days. Popular shorter sections include the 30-mile stretch from St. George to Traders Hill and the 12-mile segment from Traders Hill to Scotts Landing.

The Saint Marys is primarily a flatwater paddling experience suitable for beginners to intermediate paddlers. However, low water levels can create challenges with sandbars and snags, particularly in the upper reaches near Macclenny. Paddlers should check water levels before trips, as flows below 2 feet at the Macclenny gauge can make navigation difficult.

Spring and fall offer ideal paddling conditions with moderate temperatures and water levels. Summer can be hot and buggy, while winter provides solitude but requires cold-weather gear.

The river's ecosystem supports diverse wildlife, including alligators, river otters, and numerous bird species. Paddlers may encounter white sandbars, limestone bluffs, and cypress-lined banks.

Key access points include: - Okefenokee Swamp (put-in for full river trips) - St. George area, GA - Traders Hill Recreation Area, GA (N: 30.7831 W: -82.0240) - Scotts Landing/St. Marys River Fish Camp, FL (N: 30.7839 W: -81.9701)

The river holds historical significance as a transportation route and border between Spanish Florida and British Georgia. Today, it offers a glimpse into the natural beauty of the region, with much of its course remaining undeveloped.

For multi-day trips, primitive camping is available at designated sites, including two locations at N: 30.8014 W: -81.9613 and N: 30.8178 W: -81.9636. Paddlers should be prepared for remote conditions, bring ample supplies, and practice Leave No Trace principles.

Safety considerations include checking water levels, being aware of weather conditions, and watching for submerged obstacles. Paddlers should also be mindful of the river's remoteness in many sections and plan accordingly.

The Saint Marys River provides a unique opportunity to explore the natural border between two states, offering paddlers a chance to immerse themselves in the rich ecosystems and history of the Southeast's coastal plain.