Best natural monuments in Washington County are characterized by Appalachian Mountain terrain, offering significant overlooks and historical natural waterways. This region features diverse landscapes, from mountain peaks to tranquil lakes. It provides opportunities to explore geological formations and scenic vistas. The county's natural areas include sections of the Appalachian Trail and various state parks.
Last updated: April 25, 2026
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Tuscarora Trail — A remote trek across the backbone of Appalachia
The Appalachian Trail — America's most iconic long-distance hike
Chesapeake & Ohio Canal (C&O) Towpath — A stroll through history
The C&O Towpath — Riding along the Potomac and through America’s past
Hiking in Washington County
Running Trails in Washington County
Cycling in Washington County

Gravel biking in Washington County
MTB Trails in Washington County
Road Cycling Routes in Washington County
Big Pool is located near mile 113 along the C&O Canal Towpath. Unlike the man-made sections of the canal, Big Pool is a natural body of water that was incorporated into the canal’s design to serve as a water storage area for boat operations. Spanning about 1.5 miles in length and up to 200 feet wide, it provided an easier passage for canal boats compared to the narrower, hand-dug sections of the waterway. Today, Big Pool is a peaceful and picturesque landmark for those exploring the C&O Canal Towpath. It is also adjacent to Fort Frederick State Park, one of the most significant historical sites along the towpath. Cyclists can easily take a short detour to visit the 18th-century fort, which was built in 1756 during the French and Indian War and later played roles in both the Revolutionary War and the Civil War. The fort’s well-preserved stone walls and reconstructed barracks provide a glimpse into Maryland’s frontier history.
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At an elevation of 1,800 feet, the cliffs of Black Rock reach up roughly 1,200 feet above the valley floor. Many people looking for a day hike will hike out and back to the cliffs and viewpoints on Annapolis Rock. If you want a few more miles and like to have the trail to yourself, add on this unique overlook situated along the Appalachian Trail overlooking the Shenandoah Valley. As you make your way further north along the trail, you start to encounter a bunch of backcountry campsites where it's common to come across thru-hikers and people camping overnight along the path.
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High Rock is a park and overlook about an hour and a half outside of Baltimore and just off of the Appalachian Trail. There is a large graffitied rock (and surrounding rocks) with a great vantage point on the surrounding foothills. If you have the time, fill up a bag of trash because this local spot could use some love.
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High Rock is a park and overlook about an hour and a half outside of Baltimore and just off of the Appalachian Trail. There is a large graffitied rock (and surrounding rocks) with a great vantage point on the surrounding foothills. If you have the time, fill up a bag of trash because this local spot could use some love.
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Black Rock is a scenic lookout that provides exceptional views across the Shenandoah Valley, Massanutten Mountain, and beyond. It's a tough route up here, but the views make it all worthwhile.
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Annapolis Rock is perched atop South Mountain in Maryland. There are plenty of smaller rocks to sit down and enjoy the breathtaking west-facing views across the Cumberland Valley. The final bit of path to the lookout is very rocky, so mind your footing, but the views as you arrive make it all worthwhile. There is a water fountain in the campground neaby.
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Black Rock is a scenic lookout that provides exceptional views across the Shenandoah Valley, Massanutten Mountain, and beyond.
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Annapolis Rock is perched atop South Mountain in Maryland. There are plenty of smaller rocks to sit down on and enjoy the breathtaking west-facing views across the Cumberland Valley. The hike to Annapolis Rock is on part of the Appalachian Trail, a 2,200-mile long-distance trail that spans the eastern United States.
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Washington County, Maryland, offers a diverse range of natural monuments, primarily characterized by its Appalachian Mountain terrain. You can find stunning viewpoints like Annapolis Rock and Black Rock Cliff along the Appalachian Trail, historical natural monuments such as Maryland Heights Stone Fort, and tranquil lakes like Big Pool and Greenbrier Lake. The region also features unique geological formations like Sideling Hill.
Yes, Washington County has several natural monuments suitable for families. Big Pool, located along the C&O Canal Towpath, is a peaceful lake perfect for a relaxing visit. Greenbrier Lake in Greenbrier State Park is another excellent option, offering a 42-acre freshwater lake with white sandy beaches for swimming, canoeing, and fishing, along with hiking trails.
Many natural monuments in Washington County are accessible via popular hiking trails. The Appalachian Trail passes by Annapolis Rock and Black Rock Cliff, offering breathtaking views. For a historical hike, explore the trails around Maryland Heights Stone Fort near Harpers Ferry. You can find more hiking options, including easy and moderate trails, in our guide to Easy hikes in Washington County.
For spectacular views, consider visiting Annapolis Rock, which provides west-facing views across the Cumberland Valley. Black Rock Cliff offers exceptional views across the Shenandoah Valley and Massanutten Mountain. Additionally, High Rock Overlook, just off the Appalachian Trail, provides a great vantage point of the surrounding foothills. Maryland Heights Overlook also offers a famous view of Harpers Ferry.
Yes, Washington County is rich in historical natural monuments. Maryland Heights Stone Fort is a significant Civil War-era site near Harpers Ferry, built by the Union Army. The C&O Canal Towpath, which runs alongside Big Pool, also has historical significance as a former waterway for canal boats.
The best time to visit Washington County's natural monuments depends on your interests. Spring and fall offer pleasant temperatures for hiking and enjoying the scenery. Mid-September is particularly good for birdwatching at Washington Monument State Park, where you can spot migratory birds like hawks, eagles, and falcons. Fall foliage in the Appalachian Mountains is also a popular draw.
Absolutely! Washington County offers various routes for running and cycling. The C&O Canal Towpath, adjacent to Big Pool, is popular for both. You can find dedicated guides for Running Trails in Washington County and Road Cycling Routes in Washington County, which include routes near many natural areas.
Washington County is home to fascinating geological features. Sideling Hill is a notable geological marvel, showcasing one of the best rock exposures in the northeastern United States. Here, Interstate 68 cuts through 810 feet of strata in a tightly folded syncline, making it a unique site for geological observation.
Yes, Washington Monument State Park, located atop South Mountain, is an ideal spot for birdwatching. In mid-September, it becomes a prime location to observe migratory birds such as hawks, eagles, and falcons as they pass through the area.
Annapolis Rock and Black Rock Cliff are both located along the Appalachian Trail and offer stunning views. The hike to Annapolis Rock involves a very rocky final section, so mind your footing. Black Rock Cliff, at an elevation of 1,800 feet, provides exceptional views across the Shenandoah Valley, and while the route can be tough, the payoff is worthwhile.
Greenbrier Lake, located within Greenbrier State Park, is a multi-use recreational park featuring a 42-acre freshwater lake. It's a popular destination for swimming, canoeing, boating, and fishing, complemented by almost eleven miles of quality hiking trails.


Find even more amazing natural monuments in Washington County by checking out the top Highlights region by region:
Extend your search for the best caves by checking out these guides of the top ones in Washington County: