Portsmouth NH to Leesburg VA Road Trip Guide

The drive from Portsmouth, New Hampshire to Leesburg, Virginia spans roughly 525 miles along I-95, US-1, and US-15. This route crosses six states and takes about 8.5 to 10 hours without stops, depending on traffic around New York City and Washington D.C.

A lesser-known fact: the historic Boston Post Road (US-1) closely parallels parts of I-95, offering a slower but more scenic alternative through old colonial towns. The modern highway corridor, while efficient, obscures layers of American history from the Pilgrims to the Civil War.

This guide covers everything from fuel economics to pet-friendly stops. If you want to discover hidden gems off the main highway, check out how to find the best stops and hidden gems between cities.

The route transitions from New England's rocky coasts and dense forests to the rolling hills of the Piedmont region. In Connecticut, the Merritt Parkway (CT-15) offers a tree-lined alternative to I-95, with historic bridges and limited commercial signage.

Cultural highlights include Mystic, CT (aquarium and seaport), the Freedom Trail in Boston (detour), and Valley Forge National Historical Park in Pennsylvania. In northern Virginia, the wineries of Loudoun County are just minutes from Leesburg.

• Natural landmark: The Palisades Interstate Park (NJ) along the Hudson River
• Local commerce: Farmers' markets in New Haven, CT (9am-1pm Saturdays)
• UNESCO World Heritage Site: Independence Hall (Philadelphia, PA) – a slight detour
• Hidden off-route spot: The Delaware Water Gap National Recreation Area (PA/NJ border)

I-95 is generally well-maintained but suffers from heavy truck traffic and congestion. Use the left lane for passing. Construction zones are common, especially in Connecticut and Maryland.

For families, stop at the Kids' Castle playground in Doylestown, PA (off PA-611) or the Crayola Experience in Easton, PA. Pet-friendly rest stops: most rest areas have designated pet-walking areas; ask at the information booth.

• Fatigue management: Stop every 2 hours or 100 miles at a rest area with a coffee shop
• Recommended rest zone: Clara Barton Rest Area (Maryland, milepost 43 on I-95)
• Family stop: Please Touch Museum (Philadelphia, PA) – indoor play
• Safety note: Maryland has speed cameras on I-95; fines are mailed

Fuel economy varies: expect 25-30 mpg on highways. Gas stations are plentiful every 10-15 miles along I-95, but prices spike near major cities. Use apps like GasBuddy to save up to $0.20/gal.

Tolls are significant on this route. From New Hampshire to Virginia, you'll encounter tolls in New Hampshire (cashless), Massachusetts (Fast Lane), Connecticut (EZ-Pass), New York (EZ-Pass), New Jersey (cash/EZ-Pass), Delaware (EZ-Pass), and Maryland (EZ-Pass).

• Estimated toll cost: $35-50 for a standard car
• Rest areas: Every 30-40 miles with restrooms, vending; some have picnic tables
• Best fuel stop: Port Jervis, NY (exit 1 on I-84) for cheap gas
• Worst congestion: I-95 through the Bruckner Interchange (Bronx, NY)