Working paperIllinois

The Rise and Fall of the Golden Triangle

The Triangle earned its reputation for mature bucks rather than high deer numbers. Since 2005, Pike's total harvest has dropped 48%, while its mature-buck harvest has declined 39%. Bucks 2.5 years and older still represent 77% of its buck harvest. Adams has fared better, with mature-buck harvest down only 6%.

−48%Pike County total harvest since 2005

Between the Mississippi and Illinois rivers, Pike, Brown, and Adams are three west-central counties that earned a big-buck reputation among the best known in North America. Deer harvest totals in the Triangle later dropped sharply. The area is widely described as a once-great hunting destination that collapsed. Harvest records give a more exact picture: total deer harvest dropped much faster than mature-buck harvest, while the age makeup of the harvested bucks remained steady.

KEY FINDINGS

  1. Pike County's total harvest dropped 48% from its 2005 level, going from 8,172 to 4,284. Its mature-buck harvest, covering bucks aged 2.5 years and older, declined 39%. Mature bucks still account for 77% of the county's buck kill, a share that has stayed the same for twenty years.
  2. Adams County weathered the decline: its overall harvest slipped 21%, while the mature-buck kill lost only 6%. Harvest of trophy-age bucks remains essentially at its 2005 level.
  3. An abrupt drop marks 2012 to 2013 in each Triangle county. Within that season, Pike harvested 1,394 mature bucks compared with 2,034 previously. That break bears the signature of the hemorrhagic-disease outbreak in 2012; a partial rebound came afterward.
  4. Throughout the Triangle, harvested bucks gained ground relative to harvested does: the ratio increased, with Pike moving from 0.87 to 1.03. Bucks therefore accounted for a larger harvest share because antlerless kills declined more quickly than buck kills.

IThe making of a mecca

What sets these three river counties apart from other Illinois ground

The Golden Triangle is a promotional label that became an established name for an actual place. On Illinois' western edge, Pike, Brown, and Adams bring together large-river bottomlands, mature hardwood forests, and high-yield row-crop fields. Food from those crops and cover in the woods support strong deer numbers. For decades, Illinois restricted firearm deer hunting to slug shotguns, muzzleloaders, and handguns, adding single-shot rifles in 2023. Firearm permits were assigned through a lottery.

IITwo different declines

The overall deer kill dropped much faster than the mature-buck kill

Within the series we examined, Pike County reached its reported harvest high in 2005 with 8,172 deer. By 2024, the figure was 4,284, a decline of 48%. Beside a roughly 15% decrease across Illinois, Pike's loss appears to be a collapse. Overall harvest, however, counts killed bucks, does, and fawns, and the state's antlerless-permit supply governs that total. Looking separately at mature bucks, defined as deer at least 2.5 years old and the nearest public stand-in for “trophy-age,” puts Pike's decrease at 39%. That is smaller by nine percentage points. Adams shows an especially wide separation: overall harvest declined 21%, while mature-buck harvest slipped only 6%.

Figure 1 · Pike County · indexed to 2005 = 100Overall harvest losses make the mature-buck harvest decline look larger
  • Total harvest
  • Mature-buck (2.5+) harvest
50751002005201120182024
Each series uses its own 2005 value as the index baseline. After 2013, the mature-buck curve stays above the overall-harvest curve when each is compared with its respective 2005 starting point. This shows that the county lost overall harvest faster than mature-buck harvest. Data: IDNR harvest records; analysis by our team.
Across the Triangle, the overall deer kill declined more quickly than the kill of bucks at least 2.5 years old. Looking only at the overall total hides that separation.

IIIThe 2012 break

A single season accomplished what a decade of pressure had not

A matching abrupt break appears in every Triangle county: harvest plunged within a season from 2012 to 2013. Pike recorded 1,394 mature bucks after harvesting 2,034 previously, losing 31% within that year. Brown went from 742 to 469, while Adams went from 1,141 to 719. Those dates fit the severe epizootic hemorrhagic disease outbreak of 2012. The pattern afterward deserves equal attention. Each county's mature-buck harvest rebounds and settles into a lasting plateau. Dates by themselves cannot establish that a die-off explains the whole break, nor can they reveal later changes in the herd.

Figure 2 · Mature-buck harvest, 2005-2024A shared break in 2012, followed by three rebounds
  • Pike
  • Adams
  • Brown
5001k1.5k2k2.5k2005201120182024
Mature-buck harvest shown as actual totals. Adams climbs almost back to its level before 2012. Pike settles beneath its earlier level, and Brown stays within a lower range. Data: IDNR harvest records; analysis by our team.

IVWhat the buck-to-doe ratio shows

Why the total continued to drop after the bucks steadied

After 2013, the mature-buck kill settled into a plateau, but overall harvest continued edging lower. Across the Triangle, harvested bucks increased relative to harvested does: Pike moved from 0.87 to 1.03, and Brown from 0.89 to 1.03. Bucks took a larger share because antlerless kills dropped faster than buck kills. A declining overall harvest alongside an increasing buck share cannot establish what managers intended or whether the herd shrank.

Swipe table to see every column

CountyTotal harvest, chgMature-buck, chgMature-buck % of buck killBuck:doe, 2024FDR Trophy Index
Pike−48%−39%77%1.0364.3
Brown−33%−19%72%1.0360.7
Adams−21%−6%67%0.9849.6
Change measured from 2005 to 2024. Mature buck means a male in an age class of 2.5 years or older. The FDR Trophy Index gives a proprietary score from 0 to 100; its calculation method and weights are undisclosed. Source: IDNR harvest records; analysis by FDR.

VThe economy built on the reputation

Why fewer deer hurt even while bucks hold up

The Triangle's name helped build a hunting industry. Illinois developed a sizable outfitting and hunting-land lease economy in these counties around hunters from outside the state. Pricing reflected the promise of a place to hunt mature bucks, including non-resident deer permits and a Class A outfitter permit costing outfitters $500 for residents or $2,500 for nonresidents each year. A place marketed as a hunting destination must continue to deliver the hunt it promises.

The difference between deer and bucks matters in practical terms here. Outfitters and leaseholders sell an experience: how many deer a hunter sees during each sit, beyond the occasional buck for the wall. A 48% drop in total harvest does not prove that sightings fell by the same proportion or establish an effect on hunters from day to day. The Triangle presents a seeming contradiction. Reported mature-buck harvest has mostly held up, declining 6% in Adams, 19% in Brown, and 39% in Pike since 2005, while total reported harvest dropped 21% to 48%. Neither finding cancels the other, and each describes a different aspect of the harvest.

VIWhat it means for 2026

A fair reading of the Triangle

The Golden Triangle has changed since 2005, but calling it ruined, as deer-count headlines suggest, goes too far. Harvest records show lower totals with the trophy-age makeup of harvested bucks still intact. Adams especially appears more undervalued than diminished as a big-buck destination. If you are deciding where to use a 2026 tag, hunt the Triangle for a chance at a buck aged 2.5 years or older, rather than expecting a week full of deer to shoot. Give Adams a close look. Its mature-buck harvest has fallen the least of the three counties, down 6% since 2005, and has made the largest recovery from the 2013 low. The harvest figures support a more restrained assessment of the Triangle's reputation, both during its strongest years and as harvests declined.

NOTES AND SOURCES

  1. Across every Triangle county, the abrupt harvest drop within a single season, from 2012 to 13, fits the documented outbreak of epizootic hemorrhagic disease (EHD) in western Illinois during 2012. Source: the deer program at the Illinois Department of Natural Resources.
  2. Illinois Chronic Wasting Disease program; as of 2026, CWD had been found in 28 counties. dnr.illinois.gov/programs/cwd.
  3. Illinois historically limited firearm deer hunting to shotguns and muzzleloaders. Permits were allocated through county lotteries. The Class A outfitter permit structure is reported according to IDNR. Source: IDNR deer hunting regulations.
  4. Limits of these data: permits govern harvest totals, which have no adjustment for hunting effort. A smaller kill can result from fewer issued tags instead of fewer available deer. “Mature-buck” refers to IDNR's 2.5-year-plus age group. It approximates trophy age without measuring antler score. Figures reported by county do not separate private land from public land.

Fully Drawn Research is an independent data analysis desk, not affiliated with any state wildlife agency, transportation agency, mapping provider or outfitter. “Mature buck” denotes the IDNR harvest age class of 2.5 years and older, used here as a proxy for trophy-age deer; it is not a record-book measurement. The FDR Trophy Index is a proprietary derived metric expressed as an output score; underlying construction, weighting, and any source compilations are not reproduced. Harvest data are IDNR public records analyzed independently by FDR; figures current to the 2024 season.

Keep reading

More Illinois papers →

FDR Scout puts county harvest history like this on the map of the ground you hunt. Open Scout →

More in Harvest history

See all 45 →
← Back to research