The Appalachian Trail segment connecting Annapolis Rock and Black Rock Cliff offers some of the most rewarding ridge views along Maryland's portion of the 2,190-mile National Scenic Trail. Trailheads are accessed from the US-40 parking pullout near the I-70 overpass west of Boonsboro in Washington County — no permit is required for day hiking. Roadside parking fills quickly on weekends; arriving before 8 AM is strongly advisable. Trail maps are available at nps.gov/appa or through the Guthook AT Guide app, which is recommended given unreliable cell coverage along the ridge.
The out-and-back to Annapolis Rock covers approximately 9.4 miles round-trip with 820 feet (250 m) of elevation gain. From the US-40 trailhead, the white-blazed AT climbs northward through mixed hardwood forest up South Mountain. The surface alternates between compacted dirt, exposed quartzite slabs, and root sections. Shade is generous within the forest corridor, though the exposed ledge at Annapolis Rock receives full afternoon sun. A primitive backcountry campsite just below the ledge includes fire rings and a bear box; overnight reservations must be made through the Appalachian Trail Conservancy.
Annapolis Rock is a broad quartzite ledge near 1,800 feet offering an unobstructed west-facing panorama across the Cumberland Valley and farmland of western Maryland. Black Rock Cliff lies 1.8 miles north and provides a slightly higher vantage with views toward Pennsylvania. Extending to Black Rock creates a 13-mile loop option. Water sources are absent along the route; all hikers should carry at least two liters. Descent on the rocky quartzite sections is significantly harder on the knees than the ascent — trekking poles are a meaningful aid.
Trail facts
- Trail area
- Boonsboro (Washington County)
- Best season
- April-November; October for foliage; avoid icy conditions December-February
What to bring
- Sturdy hiking boots
- Trekking poles (helpful on descents)
- 2+ liters water
- Snacks
- Sunscreen
- Trail map from nps.gov/appa
Location
US-40 parking lot, Boonsboro, MD 21713 (trailhead)
39.5307, -77.6235 View on map
Highlights
- Annapolis Rock ledge — sweeping west-facing panorama across the Cumberland Valley at 1,800 feet
- Black Rock Cliff, 1.8 miles beyond Annapolis Rock, with north-facing views into Pennsylvania
- Primitive AT backcountry campsite below Annapolis Rock with fire rings and bear box
- Classic white-blazed AT tread through mature South Mountain hardwood forest
- October foliage corridor along the South Mountain ridgeline
Tips for visiting
- Arrive by 8 AM on weekends — roadside parking at the US-40 trailhead fills fast
- Download the Guthook AT Guide app or carry a paper map before setting out; cell coverage is unreliable on the ridge
- Carry 2+ liters of water — no reliable water sources exist along the route
- Trekking poles reduce knee strain significantly on the rocky quartzite descent
- Ankle-supporting boots are essential; quartzite sections become slippery when wet
- Reserve the Annapolis Rock campsite through the Appalachian Trail Conservancy for overnight trips
When to visit
October is peak season for fall foliage along the South Mountain corridor; April and May bring wildflowers and lighter crowds. Midweek mornings offer the fewest hikers and the best chance of available parking at the US-40 trailhead.
Accessibility
The trail involves sustained rocky, uneven quartzite terrain with no paved or flat sections. No portion is wheelchair or stroller accessible. Visitors requiring accessible viewpoints should contact the Appalachian Trail Conservancy for guidance on alternative overlooks in the Washington County region.
Frequently asked questions
Is a permit required to hike to Annapolis Rock?
No day-use permit is required. Overnight camping at the Annapolis Rock site requires an advance reservation and a small fee through the Appalachian Trail Conservancy.
How difficult is the trail to Annapolis Rock?
The 9.4-mile round-trip is rated hard due to total distance and rocky terrain. It is well suited to fit hikers comfortable with sustained uphill and uneven quartzite surfaces.
Are dogs allowed on this section of the AT?
Dogs are permitted on the Appalachian Trail in Maryland but must remain under control at all times. Pack-it-in, pack-it-out rules apply for waste; no off-leash areas exist.
When does the trail become hazardous in winter?
Quartzite ledge sections ice over from December through February. Microspikes or traction devices are strongly recommended for any winter visit to Annapolis Rock or Black Rock Cliff.
Is there cell service on the trail?
Coverage is sparse and unreliable along the South Mountain ridge. Downloading offline maps before departure via Guthook AT Guide or Avenza is strongly recommended.