The selected location is:

The elevation is 495 m ( 1624 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) = -100.5515, 44.5569; 495 m

The state and county are South Dakota: Stanley County 46117
The HUC is Lower Lake Oahe 10130105; Place point in HUC
The Omernik ecoregion is Northwestern Great Plains (less typical) 43
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Nearby named places (in order by distance)

1. Lower Sully Landing (historical); South Dakota: Sully Co. -100.5515, 44.5569 at a distance of 3 m
2. Dry Creek mouth; South Dakota: Sully Co. -100.5537, 44.5839 at a distance of 3003 m
3. Okobojo Creek mouth; South Dakota: Sully Co. -100.5176, 44.5692 at a distance of 3018 m
4. Sonnenschein Number 2 Dam; South Dakota: Stanley Co. -100.5537, 44.5883 at a distance of 3491 m
5. Oko Bojou Islands (historical); South Dakota: Hughes Co. -100.5129, 44.5417 at a distance of 3501 m
6. Okobojo Recreation Area; South Dakota: Sully Co. -100.5076, 44.5686 at a distance of 3720 m
7. Fielder Post Office (historical); South Dakota: Hughes Co. -100.5057, 44.5469 at a distance of 3804 m
8. Lewellyn Park, Township of; South Dakota: Sully Co. -100.5179, 44.5833 at a distance of 3963 m
9. Plum Creek mouth; South Dakota: Sully Co. -100.5296, 44.5908 at a distance of 4147 m
10. Telegraph Flat (historical); South Dakota: Sully Co. -100.5993, 44.5772 at a distance of 4417 m

The 7.5 minute series topographic maps for that area