Sunday Gulch Trailhead

Overview

Tucked just below the Sylvan Lake dam, Sunday Gulch Trailhead launches you into one of the park’s most adventurous loops. It starts off tame on the Sylvan Lake shore, then drops into a rocky gulch where the trail hugs a creek, threads past granite walls, and uses metal handrails to help you over big steps and boulders. Most sources put the loop near 3.9 miles with 700–800 ft of gain—moderate to strenuous if you’re not used to scrambling.

What Makes It Different

This isn’t just a walk in the woods. A quarter-mile stretch through the gulch is the star: water over rock, repeated stream crossings, and polished granite requiring hands-on movement. After the gulch, the path eases through meadows and open forest with classic Black Hills granite formations.

Route Basics

• Start at Sylvan Lake’s main lot and follow the lake shore to the signed trailhead behind the big rocks near the dam.
• Many hikers go counter-clockwise to descend the boulder-and-railing section first, then climb out on steadier trail.
• Expect slick rock if it rained recently; the creek section can feel cool and damp.

Wildlife

Small mammals and birds are common—think chipmunks, squirrels, woodpeckers, and deer sign. Keep your eyes and ears tuned along the creek and in the shaded forest.

Practicalities

• Dogs are allowed on leash.
• Restrooms, a general store, and food are near the Sylvan Lake parking area (not at the trailhead itself).
• A park entry fee is required; the trail is often closed in winter due to ice.

Is It For You?

If you like a little scrambling and don’t mind wet feet, this is a top pick. If slick rock and high steps aren’t your thing, consider a different trail or just enjoy the Sylvan Lake loop.

Best Time to Visit

• Season: Late spring through early fall for open trail and safer footing.
• Time of day: Arrive early to secure parking and enjoy a quieter gulch; afternoons can be busier around the lake.
• Weekdays see fewer people than peak summer weekends.