Overview
Sunday Gulch is the most surprising trail in the Black Hills. While Black Elk Peak gets the superlatives and the crowds, Sunday Gulch offers something rarer: an enclosed granite canyon where the walls close overhead, log ladders help you descend near-vertical rock faces, and the entire experience feels more like a slot canyon in Utah than a forest trail in South Dakota.
The 3.5-mile loop starts and ends at Sylvan Lake, descending into the gulch immediately from the trailhead and traversing the canyon bottom before climbing back to the lake on an upper trail. The descent is the highlight: the canyon walls narrow progressively until you're squeezing through passages 6 to 8 feet wide with granite slabs rising 40 to 60 feet on both sides. Log ladders installed on the steepest pitches give the trail its characteristic character.
This trail is consistently rated one of the best short hikes in Black Hills National Forest and the entire Black Hills region.
The Route
Miles 0 to 0.5: Sylvan Lake to Canyon Entry. From the Sylvan Lake parking area, the Sunday Gulch Trail breaks away from the lake loop trail and heads northwest toward the gulch drainage. The first 0.5 miles lose elevation steadily before the canyon walls begin to appear.
Miles 0.5 to 2: Canyon Traverse. This is the core of the hike. The trail descends into the gulch and the walls close in on both sides. The first major log ladder appears around mile 0.7, helping hikers down a short but steep granite pitch. The canyon floor is a mix of creek bed (there may be a trickle of water in spring), flat granite slabs, and sandy passages between boulders.
The tightest section of the canyon (around mile 1 to 1.5) is where the experience becomes genuinely enclosed. Tall ponderosa pines visible above the canyon rim provide the only sky-view in some sections. The light quality in this section in the morning is exceptional: shafts of sunlight cutting across the dark granite walls.
A second ladder section appears near the mid-canyon point. After the second ladder, the canyon begins to open and the walls drop back to a more normal scale.
Miles 2 to 3.5: Upper Return Trail. After traversing the gulch, the trail climbs out on the opposite side and follows an upper trail back toward Sylvan Lake. This section is less dramatic than the canyon but provides views of the surrounding terrain that put the gulch into geographical context. The route returns to Sylvan Lake from the west side.
Wet Conditions
A small stream runs through Sunday Gulch seasonally, primarily in spring. After significant rain, the canyon floor can be wet and the rock surfaces slippery. Wet granite requires extra care on the scrambling and ladder sections. Check weather forecasts before planning a visit, and allow a day after heavy rain for the canyon to drain.
Getting There
Sunday Gulch shares the Sylvan Lake trailhead with the Black Elk Peak Trail and Sylvan Lake Shore Trail. From Rapid City, take US-16 southwest to Needles Highway (SD-87) or Iron Mountain Road (US-16A), then follow signs to Custer State Park and Sylvan Lake. Total drive time is approximately 60 minutes. From the town of Custer, follow US-16A south approximately 20 minutes.
The $20 Custer State Park day-use fee is required at the Sylvan Lake trailhead.
What to Wear and Bring
Sturdy hiking footwear with traction is important on the log ladders and wet granite sections. Sandals or casual sneakers are not recommended. A layer for the canyon itself (it's cooler and shadier than surrounding terrain) is worthwhile in spring and fall. Many hikers carry 1 to 1.5 liters of water; individual needs vary. A small pack works better than a large one for the tight canyon passages.
For Leave No Trace practices in the Black Hills, see our Leave No Trace guide. For the broader context of public land management in the Black Hills region and the distinction between Custer State Park, Black Hills National Forest, and nearby national parks, see national forests vs. national parks.