Skip to content
Byway
JoinOpen app
Historic site · Delaware

Tri-State Marker

Tri-State Marker, a historic site in Delaware
Tri-State Marker, a historic site in DelawareSamHolt6 · CC BY-SA 4.0
Tri-State Marker, a historic site in Delaware
SamHolt6 · CC BY-SA 4.0
Tri-State Marker, a historic site in Delaware
Zeete · CC BY-SA 4.0
Tri-State Marker, a historic site in Delaware
Zeete · CC BY-SA 4.0
Tri-State Marker, a historic site in Delaware
Zeete · CC BY-SA 4.0
Tri-State Marker, a historic site in Delaware
Zeete · CC BY-SA 4.0

More photographs at the Wikimedia Commons category.

Tri-State Marker is a historic site in Delaware, at a recorded elevation of 78 m. Gap Hill stands 252 m to the north-northwest, 21 miles off. The nearest named place is Carpenter Recreation Area, a park 0.7 miles away. Mason and Dixon Byway passes 1.8 miles off. 28 named summits stand within 25 miles.

M. D. P. Corner No 2 1935

About

The story

The Delaware–Maryland–Pennsylvania Tri-State Point is the meeting of the northwestern corner of Delaware, the northeastern corner of Maryland, and the southern edge of Pennsylvania. A wooden marker was placed in 1765, by Charles Mason and Jeremiah Dixon, and was replaced with a stone marker in 1849. The tripoint site contributes to the Delaware Boundary Markers historic district, listed on the National Register of Historic Places in 1975. A trail to the marker was made in 2014–2015.

From Wikipedia, CC BY-SA 4.0.

Dates from 1849.

Wikidata Q48799760, referenced by the OpenStreetMap record.

The record

What the record says

Elevation
78 m
Inscription
Top: U.S. COAST & GEODETIC SURVEY REFERENCE MARK / FOR INFORMATION WRITE TO THE DIRECTOR, WASHINGTON, D.C. / $2500 FINE OR IMPRISONMENT FOR DISTURBING THIS MARK. / MD P CORNER NO 2 1935 Side 1: M Side 2: M Side 3: P 1849 Side 4: D
Getting there

How to reach it

Driving directionsPlan a drive around it
Coordinates39.72220, -75.78859

Overlooks nearby

Around it

Named places within 25 miles

Parks
Historic sites: 53
Nature reserves: 51
Museums: 51
Gardens: 42
Attractions: 31
Peaks: 28
Artworks: 17
Picnic sites: 8
  • Deer Creek Picnic Area: 20.9 mi
  • Ridley Creek State Park - Area 12 Picnic Site: 23.4 mi
  • Ridley Creek State Park - Area 13 Picnic Site: 23.5 mi
  • Ridley Creek State Park - Area 15 Picnic Site: 23.5 mi
  • Ridley Creek State Park - Area 14 Picnic Site: 23.5 mi
Ghost towns: 5
Beaches: 5
Cliffs: 3
Springs: 2
  • Black Rock Spring: 19.8 mi
  • Black Barren Spring: 21.3 mi
Lighthouses: 1
  • Bethel Bridge Lighthouse (replica): 13.5 mi
Rest areas: 1
On the horizon

Summits around it

The highest named summits within 25 miles of Tri-State Marker. Elevation from each summit’s own record; bearing measured between the two coordinates.

SummitBearingElevationDistance
Gap HillNNW252 m21.4 mi
Harmony HillNNE146 m18.9 mi
Mount FelixWSW142 m21.0 mi
Ebright AzimuthENE137 m16.3 mi
Goat HillW135 m15.9 mi
Mount AraratWSW134 m18.1 mi
Egg HillSW125 m7.3 mi
Hunting HillNE125 m24.3 mi
Conditions

When to go

Light through the year

DateSunriseGolden hourSunset
March equinox07:0818:4019:15
June solstice05:3619:5520:35
September equinox06:5118:2619:02
December solstice07:2116:0016:43

Local time (America/New_York).

Climate normals

Months averaging 50–80 °F: Apr–Oct.

JanFebMarAprMayJunJulAugSepOctNovDec
Avg °F343644556473787669584638
Precip in3.42.94.33.73.63.94.83.94.94.03.44.0

1991–2020 U.S. Climate Normals, NOAA NCEI — Newark AG Farm, 4 mi away.

Sources

Where this comes from

Location and category confirmed against OpenStreetMap.

OpenStreetMapWikipediaWikidata

OpenStreetMap element node/75390099

More historic sites in Delaware

Day trips start here

Drive to it

Byway plans a real route around stops like this one.

Plan a driveMore historic sites
Private beta · Free to join

Take the scenic way to Tri-State Marker.

Byway plans around your taste, mapped places, real weather and opening hours — then opens every leg in Google Maps with one tap.

Private beta · Free to join · No card · Invite when a spot opens