Big-Buck Geography: Does Trophy Production Follow the Rivers?
The oldest belief in Illinois deer hunting is that the biggest bucks live along the big rivers: the Mississippi and Illinois bottomlands. Tested county by county on the proprietary FDR Trophy Index, the belief is only half true. River-corridor counties do carry a modest trophy premium on average. But the state's very best trophy counties are inland, 70 to 120 miles from any major river. The crown has moved off the water.
- Across all 102 counties, the correlation between distance to a major river and the FDR Trophy Index is weak (r ≈ −0.33): a real tendency, not a rule.
- Near-river counties (within 20 miles) average a Trophy Index of 59, versus 47 for counties more than 50 miles out — so the river premium exists.
- But the top of the state is inland: the highest Trophy Index counties (Will, Edgar, Champaign, Piatt) sit 70–120 miles from the Mississippi or Illinois. The elite tier does not need a river.
IThe oldest belief in Illinois deer hunting
For a generation the shorthand for a giant Illinois buck has been geographic: the Mississippi and Illinois river bottoms, the timbered edges where crop fields meet floodplain. The reputation is not baseless — those corridors genuinely grow good deer, and the counties along them have produced famous animals. The question is whether that reputation still describes where the best trophy production actually is, or whether it is a story the map has outgrown.
IIA modest premium — and an inland crown
Two things are true at once. Measured across every county, proximity to a major river does track higher trophy output — the near-river band averages a Trophy Index of 59 against 47 for the far band, and the overall correlation is negative (closer means higher). That is the grain of truth in the reputation. But the correlation is weak, and the counties at the very top of the Trophy Index are not river counties at all. Will County leads the state; Edgar sits second at 121 miles from the nearest major river. The premium is real on average and irrelevant at the top.
The rivers still carry a modest edge. The crown has moved inland: Illinois's best trophy counties are 70 to 120 miles from the water.
| Distance to major river | Counties | Mean FDR Trophy Index |
|---|---|---|
| Within 20 miles | 15 | 59.3 |
| 20–50 miles | 20 | 54.9 |
| More than 50 miles | 67 | 46.7 |
Mean Trophy Index by county distance to the nearest of the Mississippi or Illinois rivers. Near-river counties average higher — the river premium — but two-thirds of counties, including several top producers, lie in the far band. Distance is an approximate county-centroid measure. Source: FDR analysis.
IIIWhat it means
The river-bottom reputation is a useful prior and a poor filter. If you rule out inland counties because they lack a big river, you rule out the best trophy ground in the state. What the top counties share is not water but the same inland east-central signature that leads the overall County Report: intensive agriculture, fragmented timber, and moderate pressure. The rivers grow good deer. So does the corn.
- Distance to a major river is an approximate measure from each county's centroid to the nearest point on the Mississippi or Illinois river corridor; it is a coarse proxy and the weak correlation should not be over-interpreted.
- The FDR Trophy Index is a proprietary derived metric expressed as a 0–100 output. It is not a record-book measurement, and underlying record compilations are not reproduced.
Fully Drawn Research is an independent data analysis desk, not affiliated with the Illinois Department of Natural Resources, the Illinois Department of Transportation, or any mapping or outfitting provider. Fully Drawn Research is independent and not affiliated with IDNR or any mapping provider. Rankings are analytical opinions from public and proprietary data, informational only — not hunting or investment advice. Figures current to 2024.