The selected location is:

The elevation is 624 m ( 2046 ft )
The gradient is: 2.1 percent
The aspect direction is: 78.7 degrees or E
The local roughness is: 0.8 or slight
The location as decimal degrees (X,Y;Z) = -99.4851, 43.2919; 624 m

The state and county are South Dakota: Gregory County 46053
The HUC is Fort Randall Reservoir 10140101; 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. Edens, Township of; South Dakota: Gregory Co. -99.4851, 43.2919 at a distance of 1 m
2. East Branch Bull Creek mouth; South Dakota: Gregory Co. -99.5112, 43.3167 at a distance of 3474 m
3. Robertson Number 1 Dam; South Dakota: Gregory Co. -99.4671, 43.3383 at a distance of 5358 m
4. Dallas, Town of; South Dakota: Gregory Co. -99.5182, 43.2378 at a distance of 6583 m
5. Bull Creek head; -99.5226, 43.2381 at a distance of 6708 m
6. Dallas; South Dakota: Gregory Co. -99.5171, 43.2361, ( 2194 ft ) at a distance of 6722 m
7. South Fork Whetstone Creek head; -99.4121, 43.2628 at a distance of 6752 m
8. East Branch Bull Creek head; -99.4143, 43.2581 at a distance of 6867 m
9. Gregory; South Dakota: Gregory Co. -99.4304, 43.2322, ( 2166 ft ) at a distance of 7983 m
10. Hillview Cemetery; South Dakota: Gregory Co. -99.5315, 43.2272 at a distance of 8115 m

The 7.5 minute series topographic maps for that area