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
Tyres, and the gauge the law requires
Delaware writes tyre equipment into its beach regulation. A low pressure tyre gauge is one of the five items a surf fishing vehicle must carry, and it is the one people forget because it does not look like recovery gear. Buy one that reads accurately at the bottom of its range.
The state publishes no pressure to run, so the choice is yours and the consequence is yours too: the same regulation caps you at 15 miles an hour and asks for whatever speed maintains traction and steerage. A wide all-terrain that floats aired down will do more for you here than any tread pattern designed for mud.
Tires are the only part of the vehicle that touches the ground, and on a loaded rig they work close to their limits. A good tire shop starts with load rating and size, then tread. It will also tell you when the tire you want will rub, need different wheels or throw off your gearing.
Expect help with
01Choosing a tire by load, terrain and season
02Wheels with the right offset and load rating
03Mounting, balancing and tire pressure sensors
04A matching full-size spare
05Alignment, rotation and repairs
How to choose tires for overland travel
Tread pattern is the last decision, not the first.
01Match the load rating to your real axle weights, not to the badge on the fender.
02All-terrain tires suit most overland travel. Mud-terrains are louder, heavier and wear faster, and earn it only in real mud and rock.
03Buy five. A matching full-size spare that you rotate in is worth the money when the nearest tire shop is a day away.
04Check the wheels too. Wheels have load ratings, and the wrong offset stresses bearings and rubs.
05Ask whether the shop can move or reprogram your tire pressure sensors.
What to have ready before you ask for a quote
A tire quote is quick when the shop knows what the tire has to carry.
01Vehicle, current tire size and wheel size
02Lift height, if any
03Loaded weight, or a list of what is on the vehicle
04Where you drive most: pavement, gravel, rock, sand, snow
05A budget range for five tires
Questions people ask
What does load range mean?
It describes how much weight a tire can carry at a given pressure. Heavier builds, vans and truck campers usually need a higher load range than the vehicle came with. The tire's sidewall and the placard in the door jamb are the places to start, and a tire shop can work through the numbers with you.
How big can I go?
Every platform has a size that fits at stock height, a size that fits with a modest lift, and a size that needs trimming and gears. Tell the shop your lift and wheels and ask what fits without rubbing at full steering lock and full compression.
Should I air down?
On washboard, sand and rock, lower pressure gives a better ride and more traction and is easier on the vehicle. It also means you need a way to air back up before pavement. How low depends on your tire, your weight and your speed, so ask your tire shop and start conservatively.
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.
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