The selected location is:

The elevation is 633 m ( 2076 ft )
The gradient is: 5.6 percent
The aspect direction is: 297.2 degrees or NW
The local roughness is: 4.0 or average
The location as decimal degrees (X,Y;Z) = -100.6796, 44.9908; 633 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 (more typical) 43
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Nearby named places (in order by distance)

1. Little Willow Creek head; -100.6796, 44.9908 at a distance of 2 m
2. Fast Horse Ranch; South Dakota: Dewey Co. -100.6712, 44.9719 at a distance of 2204 m
3. Corral Creek head; -100.6696, 44.9661 at a distance of 2858 m
4. West Branch Willow Creek head; -100.6954, 45.0264 at a distance of 4146 m
5. Clark Ranch; South Dakota: Dewey Co. -100.7229, 44.9647 at a distance of 4483 m
6. Means Ranch; South Dakota: Dewey Co. -100.6437, 44.9519 at a distance of 5169 m
7. Dan Gray Ranch; South Dakota: Dewey Co. -100.6087, 45.0111 at a distance of 6027 m
8. C Peterson Number 1 Dam; South Dakota: Dewey Co. -100.6937, 45.0467 at a distance of 6309 m
9. No Heart Creek head; -100.7415, 45.0275 at a distance of 6359 m
10. East Branch Willow Creek head; -100.6526, 45.0542 at a distance of 7358 m

The 7.5 minute series topographic maps for that area