Overview
Hellhole Bay Wilderness is one of four designated wilderness areas in Francis Marion National Forest and protects 2,125 acres of Carolina bay wetland in the Coastal Plain of South Carolina. A Carolina bay is an oval or elliptical depression in the landscape, often filled with water or dense wetland vegetation, and Hellhole Bay is one of the finest intact examples in the country.
The loop trail circles the perimeter of the wilderness on the slightly higher ground surrounding the bay, passing through alternating pocosin scrub, Atlantic white cedar stands, and longleaf pine edges. The bay interior itself is almost impenetrable dense shrub, which is part of what makes the designated wilderness effective: the terrain protects itself.
The Route
Trailhead to East Bay Edge (Miles 0-1.8) The trail begins at Forest Road 171 and travels east through longleaf pine before reaching the wilderness boundary. The transition from pine savanna to the dense pocosin shrub of the bay edge is abrupt and unmistakable. The bay's interior vegetation, dense with titi and pond pine, is visible and impenetrable.
North Bay Traverse (Miles 1.8-3.5) The trail follows the northern edge of the bay through alternating pine and pocosin. In winter, the dense Atlantic white cedar stands along the north edge are visible. Carnivorous plants, including pitcher plants and sundews, grow in the wet areas adjacent to the trail.
West Edge and Return (Miles 3.5-6.4) The western section passes the bay's deepest and wettest area before returning south to the trailhead. This section may have standing water on the trail after heavy rain; waterproof footwear is practical. The return leg passes through longleaf pine with the wilderness to the east.
When to Hike
November through March is strongly recommended for this trail. The titi and pocosin vegetation is densest in summer and fall, and the mosquito and biting fly population is overwhelming from May through October. Winter visits deliver quiet, clear air, and the best wildlife activity.
April spring migration can be excellent at the bay edge, but insect pressure begins in late April.
May through October this trail is best avoided due to heat, humidity, and extreme insect activity. This is not an exaggeration for the Lowcountry wilderness terrain.
What to Bring
Many hikers carry 1.5 liters of water. Insect repellent is mandatory from April through October and strongly recommended even in winter. Waterproof footwear for wet trail sections. A paper trail map since the trail is less well-marked than the Swamp Fox routes. Keep dogs leashed and away from water. Individual needs vary. Check conditions at /learn/checking-conditions-before-you-go.
Trailhead Access
The trailhead is off Forest Road 171, reached from Moncks Corner via US-17A north to SC-402 west. The last 2 miles are gravel, manageable for passenger cars in dry conditions. No permit or fee is required as of 2026. No restroom. Dogs are welcome on leash. No cell service.
Nearby
The Swamp Fox Trail East Section provides a longer trail experience in the forest's central unit. The Ion Swamp Trail is a more accessible swamp walk near the southern forest. Follow Leave No Trace in the wilderness: /learn/leave-no-trace-7-principles.