The selected location is:

The elevation is 552 m ( 1811 ft )
The gradient is: 0.0 percent
There is no aspect direction.
The local roughness is: 0.0 or flat
The location as decimal degrees (X,Y;Z) = -99.9040, 44.8369; 552 m

The state and county are South Dakota: Sully County 46119
The HUC is Lower Lake Oahe 10130105; Place point in HUC
The Omernik ecoregion is Northeastern Great Plains (more typical) 45
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Nearby named places (in order by distance)

1. Cottonwood Lake; South Dakota: Sully Co. -99.9040, 44.8369, ( 1800 ft ) at a distance of 2 m
2. Cottonwood Lake State Wildlife Refuge; South Dakota: Sully Co. -99.9137, 44.8339 at a distance of 837 m
3. Mundt Lake; South Dakota: Sully Co. -99.9037, 44.8500 at a distance of 1454 m
4. R Mundt Dam; South Dakota: Sully Co. -99.9037, 44.8500 at a distance of 1454 m
5. Morton, Township of; South Dakota: Sully Co. -99.8476, 44.8458 at a distance of 4567 m
6. Harrison, Township of; South Dakota: Sully Co. -99.9693, 44.8458 at a distance of 5256 m
7. Earling, Township of; South Dakota: Lyman Co. -99.9448, 44.8906 at a distance of 6781 m
8. Kaspar Post Office (historical); South Dakota: Sully Co. -99.8171, 44.8269, ( 1875 ft ) at a distance of 6961 m
9. Fairview School; South Dakota: Sully Co. -99.8582, 44.7717 at a distance of 8103 m
10. Rich Valley School; South Dakota: Sully Co. -99.9385, 44.7664, ( 1860 ft ) at a distance of 8298 m

The 7.5 minute series topographic maps for that area