The selected location is:

The elevation is 732 m ( 2400 ft )
The gradient is: 1.4 percent
The aspect direction is: 59.3 degrees or NE
The local roughness is: 1.0 or average
The location as decimal degrees (X,Y;Z) = -100.9049, 45.0236; 732 m

The state and county are South Dakota: Dewey County 46041
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. West Branch Rousseau Creek head; -100.9048, 45.0236 at a distance of 6 m
2. Fox Creek head; -100.8948, 45.0131 at a distance of 1414 m
3. Mossman; South Dakota: Dewey Co. -100.9260, 45.0236, ( 2350 ft ) at a distance of 1664 m
4. Saint Basils Church; South Dakota: Dewey Co. -100.8932, 45.0372, ( 2384 ft ) at a distance of 1768 m
5. Thatcher; South Dakota: Dewey Co. -100.9276, 45.0219, ( 2230 ft ) at a distance of 1801 m
6. East Branch Rousseau Creek head; -100.8962, 44.9964 at a distance of 3102 m
7. Charlie Creek head; -100.8626, 45.0367 at a distance of 3635 m
8. Hazel Miller Number 1 Dam; South Dakota: Dewey Co. -100.9121, 45.0633 at a distance of 4446 m
9. Cottonwood Creek head; -100.8518, 45.0678 at a distance of 6449 m
10. Simon Ranch; South Dakota: Dewey Co. -100.9873, 45.0239 at a distance of 6497 m

The 7.5 minute series topographic maps for that area