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) = -89.9307, 40.4364; 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 Central Corn Belt Plains (less typical) 54
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Nearby named places (in order by distance)

1. Goose Slough; Illinois: Fulton Co. -89.9306, 40.4364 at a distance of 9 m
2. Goose Lake; Illinois: Fulton Co. -89.9270, 40.4419 at a distance of 690 m
3. Clear Lake; Illinois: Mason Co. -89.9265, 40.4264 at a distance of 1162 m
4. Beebe Lake; Illinois: Fulton Co. -89.9395, 40.4461 at a distance of 1314 m
5. Duck Creek mouth; Illinois: Fulton Co. -89.9462, 40.4417 at a distance of 1443 m
6. Buckbrush Slough; Illinois: Fulton Co. -89.9234, 40.4503 at a distance of 1666 m
7. Woodyard Slough; Illinois: Fulton Co. -89.9482, 40.4267 at a distance of 1832 m
8. Mink Island; Illinois: Fulton Co. -89.9223, 40.4561 at a distance of 2304 m
9. Clear Lake Outing Club; Illinois: Mason Co. -89.9198, 40.4169 at a distance of 2350 m
10. Senate Island; Illinois: Fulton Co. -89.9095, 40.4506 at a distance of 2394 m

The 7.5 minute series topographic maps for that area