Brunswick to St. Simons Island: Coastal Georgia Road Trip

The drive from Brunswick to St. Simons Island spans just 8 miles across the Torras Causeway (GA-25 Spur), yet it condenses centuries of coastal Georgia history into a short journey. This causeway, built in 1924, replaced a ferry that operated since the 18th century and was the first bridge to connect the mainland to the island, transforming the region’s accessibility.

As you cross the marshes, the transition from Brunswick’s historic port city to the laid-back island vibes feels immediate. The route is part of the Colonial Coast Birding Trail, and the causeway offers panoramic views of the salt marsh, one of the most productive ecosystems on Earth. Keep an eye out for egrets, herons, and perhaps a bald eagle.

This guide explores everything from how long to drive Brunswick, GA to St. Simons Island, GA (approximately 15 minutes without traffic), to the best stops Brunswick, GA to St. Simons Island, GA. We answer is it worth driving Brunswick, GA to St. Simons Island, GA? Absolutely, for the marsh views alone, but there are many things to do between Brunswick, GA and St. Simons Island, GA that make this short trip a day-long adventure.

The Torras Causeway is a four-lane road with a 45 mph speed limit, making it a quick and well-maintained route. Toll-free since its construction, it offers ample shoulders for cyclists and pedestrians, though bike lanes are not delineated. Parking on the causeway is prohibited, but there are two public fishing piers and a kayak launch at the Marshes of Glynn Overlook Park on the mainland side.

• Fuel: Brunswick has numerous gas stations along US-17 and GA-25. On the island, gas is available but pricier. Fill up before crossing to save $0.30-0.50 per gallon.
• Route Economics: Drive time can double during peak summer weekends or when drawbridges open for boat traffic. Check bridge schedules for Tower Bridge (part of the causeway).
• Best Stops: Before crossing, consider the Brunswick Old Town historic district (Gloucester Street) for local shops. On the island, the landmark St. Simons Lighthouse Museum is the first major attraction.

For those wondering how to find the best stops and hidden gems between cities, check out this comprehensive guide.

The salt marshes along the causeway are part of the 21,000-acre Glynn County marsh system, protected by the Marshes of Glynn Land Trust. Japanese oysters, ribbed mussels, and cordgrass dominate this ecosystem. Birdwatchers frequent the causeway during spring and fall migrations.

• Climate: Humid subtropical with mild winters (avg. 50°F) and hot summers (avg. 90°F). Best driving months are October to May for lower humidity.
• Aesthetics: The causeway’s low elevation provides a sea-level perspective of the marsh. At sunset, the marsh grass turns gold against a pink sky. Instagram-worthy spots include the Marshes of Glynn Overlook Park.

Culture: Brunswick is known for its shrimp fleet and the historic Ritz Theatre. St. Simons Island has the WWII Home Front Museum at the lighthouse. Local commerce includes seafood restaurants (e.g., The Half Shell) and boutiques in the Village area.

Off-Route: Just north of Brunswick, Hofwyl-Broadfield Plantation (about 10 min) offers a glimpse into rice plantation history and a 1,500-acre pristine marsh trail. South of the route, the city of Darien (15 min) has the Sapelo Island National Estuarine Research Reserve ferry.

Road quality is excellent; the causeway is paved with asphalt and well-lit. Wildlife hazards include deer at dawn/dusk and turtles crossing in spring. Speed enforcement is regular, with a 45 mph limit strictly enforced. No safety rest areas exist directly on the causeway, but the Marshes of Glynn Overlook Park has benches and a pavilion.

• Family Suitability: Highly recommended. Kids love the fishing piers and the lighthouse. The nearby St. Simons Island Pier has a playground. Driving time is short enough to avoid restlessness.
• Pet-Friendly: Both Brunswick and St. Simons Island are pet-friendly. The causeway has sidewalks but no dedicated pet areas. Many island restaurants have outdoor seating for dogs. Leash laws apply.
• Fatigue Management: With a 15-minute drive, fatigue is not an issue. However, for extended trips from farther away, the Brunswick rest area on I-95 (exit 36) is a good stop.

Hidden Gems: Near the causeway, the endangered and endemic Georgia aster wildflower blooms in October at the marsh edges. For a unique experience, try paddleboarding in the tidal creeks via Southeast Adventure Outfitters (kayak launch at the causeway).