USGS, footnoted to the National Geodetic Survey. The state survey measures the monument itself at 447.85 ft and the ground just west of the road at around 450
Delaware Climate Office. Mean annual temperature runs from 54.0°F in northern New Castle County to 58.1°F on the Atlantic coast
The season a guide works here
Delaware has two clocks. Beach access runs all year on a permit, but the peak season from Memorial Day weekend to the Monday after Labor Day brings reservations at five of the twelve drive-on beaches on weekends and holidays and shuts off-peak permit holders out on those days entirely.
The other clock is the birds. The Point at Cape Henlopen closes every March and reopens in the late summer or early autumn, and any posted nesting area anywhere on the coast is closed to vehicles for as long as the signs are up. A guide who does not build a spring itinerary around that is guessing.
A guide earns the fee in the places where the map runs out of detail. They know which wash flooded last week, which gate is locked, where the fuel is, and how long the hard section really takes with a group.
A guided trip usually brings
01Route knowledge and current conditions
02Permits and access already arranged
03Recovery skill and equipment
04A pace that suits the group
05The history and natural history of the place
How to choose a guide
Ask the questions a land manager would.
01Ask whether they hold the permits and insurance required to operate commercially on the land they use.
02Ask about group size and the minimum vehicle requirements.
03Ask what is included: meals, camping gear, communications, a support vehicle.
04Ask about first-aid training and the plan for emergencies.
What to tell a guide
Honesty about experience makes for a better trip.
01Your vehicle and what has been done to it
02Your experience off pavement
03Who is coming, including children and dogs
04Your dates, and what you most want to see
Questions people ask
Do I need a guide?
Not for most travel. A guide earns the fee on routes that are remote, technical or hard to get permits for, and on first trips where you would rather learn than guess.
Can I join a guided trip in my own vehicle?
That is how most overland guiding works. The guide leads in their vehicle, you drive yours, and the trip sets minimum requirements for the vehicles that come.
How high is Delaware?
From Rehoboth Beach at 1 feet to Ebright Road, at the Pennsylvania line at 448.
Altitude decides what your engine, your brakes and your lungs have to work with, and how late in the year the passes open.
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Feet above sea level
Towns
WilmingtonThe Brandywine Valley byway, and thirteen Underground Railroad sites on the Tubman route91 ft
HarringtonTaber State Forest country, and the inland pond parks59 ft
GeorgetownThe county seat below Redden State Forest53 ft
SmyrnaThe turn for Bombay Hook and for Blackbird State Forest32 ft
DoverThe capital, and the John Dickinson Plantation out on the bayshore road28 ft
LaurelNanticoke byway country and the southern end of the Woodland Ferry run27 ft
MillsboroInland services on the Indian River, west of the inlet24 ft
SeafordThe Nanticoke River crossing and the northern ferry approach23 ft
MilfordMid-state services between the bayshore refuges and the coast13 ft
LewesThe ferry landing, Cape Henlopen and the Beach Plum Island crossing13 ft
MiltonThe approach to Prime Hook and the bayshore marshes11 ft
New CastleThe northern end of the Delaware Bayshore Byway10 ft
Bethany BeachThe break in the state park between Delaware Seashore and Fenwick Island6 ft
Fenwick IslandThe southernmost drive-on beaches and the Maryland line5 ft
Dewey BeachThe northern end of the Delaware Seashore barrier strip5 ft
Rehoboth BeachFull services between Gordons Pond and the Delaware Seashore beaches1 ft
Passes, high roads and summits
Ebright Road, at the Pennsylvania lineThe state high point, in New Castle County. USGS publishes 448 feet, footnoted to the National Geodetic Survey; the Delaware Geological Survey measures the benchmark at 447.85 and the ground just west of the road at around 450448 ft
Iron HillOur own reading of the elevation surface at its map point, in New Castle County335 ft
Chestnut HillOur own reading of the elevation surface at its map point, in the piedmont of New Castle County297 ft
Pass, road and summit elevations are the figures published by the agency that manages them. Town elevations are the town’s or county’s own
figure where it publishes an exact one; the rest are from the U.S. Geological Survey (3D Elevation Program at the place’s official coordinates),
retrieved September 18, 2026. Every source is listed at the foot of the page.