The selected location is:

The elevation is 131 m ( 430 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) = -90.2029, 40.1769; 131 m

The state and county are Illinois: Mason County 17125
The HUC is Lower Illinois-Lake Chautauqua 07130003; Place point in HUC
The Omernik ecoregion is Interior River Lowland (less typical) 72
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Nearby named places (in order by distance)

1. Holmes Landing; Illinois: Schuyler Co. -90.2029, 40.1769, ( 435 ft ) at a distance of 5 m
2. Wilson Creek mouth; Illinois: Fulton Co. -90.2018, 40.1778 at a distance of 140 m
3. Jack Lake; Illinois: Mason Co. -90.1829, 40.1756 at a distance of 1708 m
4. Curtis Lake; Illinois: Mason Co. -90.1984, 40.1589 at a distance of 2030 m
5. Bluff City; Illinois: Schuyler Co. -90.2304, 40.1803, ( 462 ft ) at a distance of 2375 m
6. Patterson Bay; Illinois: Mason Co. -90.1837, 40.1600 at a distance of 2484 m
7. Swan Lake; Illinois: Mason Co. -90.1779, 40.1900 at a distance of 2580 m
8. Anderson Lake; Illinois: Fulton Co. -90.1848, 40.1997 at a distance of 2968 m
9. Dixon School; Illinois: Schuyler Co. -90.2345, 40.1636 at a distance of 3069 m
10. Snicarte Island; Illinois: Mason Co. -90.2029, 40.1475 at a distance of 3259 m

The 7.5 minute series topographic maps for that area