Cumberland to Leesburg: Road Trip Guide

This 120-mile drive along Interstate 68 and US-15 follows the historic National Road, America's first federally funded highway. You'll traverse the Allegany Plateau and the Catoctin Mountains, with the Potomac River as a constant companion.

Driving time is typically 2.5 hours without stops, but the appeal is in the journey—a mix of mountain views, small towns, and Civil War history.

Quick Facts

Begin on I-68 East from Cumberland, then merge onto US-15 South near Frederick, MD. The highway is well-maintained, with frequent rest areas and fuel stops every 20-30 miles. As of 2025, gas prices range from $3.20 to $3.80 per gallon, and driving the full route costs roughly $18 in fuel for a standard sedan.

What to Expect on the Road

• No tolls on I-68 or US-15.
• Mountain passes near Sideling Hill are steep but safe.
• Traffic is light except near Frederick and Leesburg during rush hour.

For planning your stops, this guide on finding the best stops and hidden gems offers practical tips.

I-68 is a modern divided highway with wide shoulders and clear signage. In winter, expect snow and ice; the Maryland State Highway Administration uses a real-time road condition map. In summer, afternoon thunderstorms are common, so pack rain gear and allow extra time.

For rest stops, Sideling Hill Welcome Center offers restrooms and panoramic views. For families, the Discovery Station in Hagerstown is a hands-on science museum, and the Potomac Overlook Regional Park has nature trails. Many restaurants and shops welcome well-behaved pets on patios, and the C&O Canal towpath is perfect for dog walks.

Combating Fatigue

The drive's biggest danger is monotony—long straight stretches can lull you. Plan stops every 90 minutes; the town of Frederick has a historic district with coffee shops and antique stores. Also, watch for deer at dawn and dusk, especially near forest edges.

For an off-route gem, detour to Burkittsville, the site of the Blair Witch legend, or explore the Washington County Rural Heritage Museum in Boonsboro.

The route showcases the Allegheny Mountains' folded rock layers, visible at Sideling Hill's road cut—a geological marvel. The landscape transitions from dense forest to rolling Piedmont farmland, with apple orchards near the West Virginia border.

Along the way, the Chesapeake & Ohio Canal National Historical Park follows the Potomac, and the region is part of the Civil War Trails network. For a taste of local culture, stop in Boonsboro, home to a historic main street and the Gathland State Park.

UNESCO Sites and Nearby Attractions

While there are no UNESCO World Heritage Sites directly on the route, the nearby Antietam National Battlefield, a National Historic Landmark, is a 15-minute detour and offers profound historical context.

Harper's Ferry, West Virginia, at the confluence of the Potomac and Shenandoah rivers, is a historic town that's part of a national historical park.