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Historic site · North Dakota

Mile 186½ North Dakota South Dakota boundary marker

Mile 186½ North Dakota South Dakota boundary marker from directly overhead

Mile 186½ North Dakota South Dakota boundary marker is a historic site in North Dakota, at a modelled elevation of 516 m. Lonesome Butte stands 689 m to the south-southwest, 14 miles off. The nearest named place is Vanervorsite Bay Recreational Area, a park 1.8 miles away. Native American Scenic Byway passes 4.5 miles off. 28 named places lie within 25 miles, 12 of them named summits.

The record

What the record says

Built
1891
Material
quartzite
Getting there

How to reach it

Driving directionsPlan a drive around it
Coordinates45.94347, -100.43091
Around it

28 named places within 25 miles

Peaks: 12
  • Smith Butte: 4.3 mi
  • Fritz Butte: 4.7 mi
  • Lookout Butte: 5.6 mi
  • Hall Hill: 7.5 mi
  • Lone Butte: 11.3 mi
Parks: 11
  • Vanervorsite Bay Recreational Area: 1.8 mi
  • Pollock Recreation Area: 7.6 mi
  • Pocasse National Wildlife Refuge: 7.9 mi
  • Shaw Creek Recreation Area: 10.9 mi
  • Cattail Recreation Area: 13.1 mi
Historic sites: 2
Attractions: 1
Museums: 1
  • Sitting Bull Visitor Center: 15.4 mi
Nature reserves: 1
On the horizon

Summits around it

The highest named summits within 25 miles of Mile 186½ North Dakota South Dakota boundary marker. Elevation from each summit’s own record; bearing measured between the two coordinates.

SummitBearingElevationDistance
Lonesome ButteSSW 208°689 m13.6 mi
Rattlesnake ButteSSW 205°684 m18.1 mi
Barren ButteNW 309°660 m23.2 mi
Elk ButteSW 226°659 m23.9 mi
Smith ButteN 359°654 m4.3 mi
Braun ButteNNE 30°640 m12.5 mi
Lookout ButteNNW 343°639 m5.6 mi
Fritz ButteN 6°635 m4.7 mi
Conditions

When to go

Light through the year

DateSunriseGolden hourSunset
March equinox07:4619:1519:54
June solstice05:5220:5021:37
September equinox07:2919:0219:41
December solstice08:2116:1017:00

Local time (America/Chicago).

Climate normals

Months averaging 50–80 °F: May–Sep.

JanFebMarAprMayJunJulAugSepOctNovDec
Avg °F141831455767737162463119
Precip in0.40.50.71.32.83.22.72.21.51.60.50.5

1991–2020 U.S. Climate Normals, NOAA NCEI — Pollock, 7 mi away.

Sources

Where this comes from

Location and category confirmed against OpenStreetMap.

OpenStreetMap

OpenStreetMap element node/10677399708

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