Colorado Unit 91 Mule Deer Hunting Guide
Colorado Unit 91 sits at a low-elevation range of 3,655 to 4,007 feet across roughly 49,060 total acres, making it one of the lower-lying mule deer units in the state's western landscape. For hunters combing through Colorado's unit-by-unit options, Unit 91 stands out primarily because of its hunt structure: there is no general season here. Every mule deer hunt in Unit 91 is limited-quota, meaning hunters must draw a tag before ever setting foot in the field — including for antlered bucks.
That draw-only status changes the calculus for anyone considering this unit. Unlike units where a buck tag can be bought over the counter, Unit 91 requires hunters to plan around the draw system from day one. With only 24% of the unit in public ownership, access is also a defining feature — the majority of Unit 91 is private land, and that reality shapes almost every other decision a hunter will make here, from scouting to boot-leather logistics.
This article breaks down what the data shows about Unit 91: recent harvest trends, herd survey information, trophy potential, and how the application process works, so hunters can decide whether this unit deserves a spot on their short list.
HuntPilot Analysis: Is Unit 91 Worth Applying For?
The honest answer depends heavily on what a hunter is looking for. Unit 91's limited-quota structure means every tag — antlered or otherwise — requires a successful draw, which already signals a level of built-in scarcity that general-season units don't have. That scarcity has translated into a wide range of recent harvest outcomes, and hunters need to look at the full multi-year picture rather than any single season.
The biggest constraint on this unit is access. With just 24% public land, the majority of Unit 91 is private property. That's a critical fact for any DIY-minded hunter: this is not a unit where a hunter can show up, park at a trailhead, and expect wide-open public ground to roam. Successful hunts here likely depend on either drawing a tag with a specific access plan already in place — private land permission, a landowner voucher, or a guided arrangement — or being prepared to hunt hard on the public fraction that does exist. Hunters without a land-access plan should think carefully before spending points here.
The herd data also introduces some nuance. The 2024 survey reported a buck-to-doe ratio of 39:100, based on a single survey year. A single-year sample is a limited window into herd health, and without multiple years of survey data to establish a trend, this ratio should be treated as a snapshot rather than a definitive statement about buck age structure or population stability in Unit 91. Hunters should treat this figure as directional information only, not a guarantee of what they'll see in the field.
Given the low public land percentage, the draw-only hunt structure, and a single year of survey data, Unit 91 is best suited to hunters who already have an access plan — whether that's a family connection to private ground, a hunting lease, or a guide relationship — rather than hunters looking for an open-access, boots-on-the-ground public land hunt.
Harvest Success Rates
Unit 91's harvest numbers over the past four seasons show real volatility, and hunters researching this unit should pay close attention to the swings rather than fixating on any single year.
- 2025: 291 hunters, 74 harvested, 25% success
- 2024: 658 hunters, 265 harvested, 40% success
- 2023: 731 hunters, 235 harvested, 32% success
- 2022: 744 hunters, 269 harvested, 36% success
The pattern here is notable. Hunter numbers dropped sharply from 2022-2024 (all in the 650-750 range) down to just 291 in 2025 — a reduction of more than half. Success rates have also swung meaningfully, from a high of 40% in 2024 down to 25% in 2025. That drop in both hunter volume and success rate in the most recent season is worth flagging: it could reflect tighter tag quotas, a tougher season, herd fluctuations, or some combination of factors not fully captured in the available data.
For context, a 25-40% success range across these years puts Unit 91 in a moderate-to-solid success bracket relative to many limited-quota mule deer units, but the inconsistency year-to-year means hunters shouldn't assume any given season will replicate the last. Anyone drawing a tag here should go in with realistic expectations shaped by the full four-year window, not just the best or worst year on record.
Trophy Quality
The counties overlapping Unit 91 carry a moderate history of trophy-class mule deer records. That history is shared across the broader county area — meaning trophy bucks attributed to these counties may have been taken in Unit 91 or in any of the neighboring units that share the same county boundaries. This is an important distinction: trophy records are logged by county, not by hunt unit, so hunters should not assume Unit 91 alone is responsible for a given county's trophy tally, nor should they expect that record to be exclusive to this unit.
That said, a moderate trophy history suggests Unit 91's surrounding landscape has produced quality bucks over time, even if it isn't among Colorado's headline trophy destinations. Hunters looking for the state's most elite trophy potential units — the kind that regularly produce bucks scoring at the top tier of record-book entries — will find better-documented trophy pedigrees elsewhere. Hunters looking for a legitimate shot at a mature buck in a lower-pressure, draw-controlled environment may find Unit 91's moderate trophy history and strictly limited-quota structure to be a reasonable trade-off.
Given the low public land percentage, mature bucks in this unit likely spend significant time on private ground where hunting pressure is lower — a dynamic that can support better age structure in localized pockets, even without headline-level trophy statistics.
Herd Health & Population Trends
The only survey data available for Unit 91 comes from a single year — 2024 — which reported a buck-to-doe ratio of 39:100. This ratio falls within a biologically normal range for mule deer (well under the threshold that would suggest a statistically unreliable small sample), so it doesn't raise the same red flags that an inflated ratio might. However, with only one year of data, there's no multi-year trend to lean on. Hunters can't yet tell whether 39:100 represents a stable pattern, an improving herd, or a declining one.
Given the limited survey window, hunters should treat this ratio as a useful data point but not a definitive statement on herd health. Anyone seriously considering Unit 91 should monitor HuntPilot's unit page for updated survey data in future years, since a second or third data point would substantially improve confidence in whatever trend emerges.
Access & Terrain
Unit 91 sits at a notably low elevation band — 3,655 to 4,007 feet — which is modest compared to many of Colorado's high-country mule deer units. This lower elevation profile suggests terrain that likely transitions between lower-elevation shrublands and drainage bottoms rather than alpine basins or heavy timber, though hunters should confirm specific terrain features on the ground or via mapping tools rather than assuming based on elevation alone.
The defining access statistic for Unit 91 is its public land percentage: just 24%. That means the substantial majority — roughly three-quarters — of the unit's 49,060 acres is privately held. This is a critical planning consideration. Unit 91 is not a unit where DIY hunters can expect abundant public access; hunters without a private land arrangement, landowner permission, or guided access will be competing for a relatively small footprint of public ground.
With zero percent wilderness designation, there are no wilderness-specific access restrictions to worry about in Unit 91 — this isn't a unit requiring specialized backcountry travel or guide mandates tied to wilderness boundaries. But the low public land percentage means the practical access challenge here is less about physical terrain difficulty and more about property lines. Hunters serious about this unit should use HuntPilot's public land overlay tools well before the season to identify exactly where the public parcels sit relative to likely deer habitat, and to scout access points carefully given how fragmented the public ground likely is.
How to Apply
Because Unit 91 has no general season, every mule deer hunter — resident or nonresident — must go through Colorado's draw system to get a tag here. There is no over-the-counter fallback option for this unit; a hunter's only path to hunting Unit 91 is a successful draw application.
Colorado's draw system operates as a true preference-point system for mule deer. This means hunters with the highest number of accumulated points are prioritized in the draw, and a high enough point total can effectively guarantee a tag on many hunts, depending on how competitive that specific hunt code is in a given year. Colorado does not use a simple weighted lottery — it's a genuine preference system where banked points carry real, escalating weight over time.
Residents and nonresidents apply through separate pools, and nonresidents should expect this unit's draw — like most Colorado limited-quota deer hunts — to require a meaningful point investment given the total lack of general-season alternative. Hunters who draw a tag here will have their preference points reset, so anyone planning multiple attempts at Unit 91 (or comparable limited-quota units) over time should think in terms of rebuilding points after each successful draw rather than assuming points persist afterward.
Because application dates, fees, and current draw odds shift every cycle, hunters should not rely on any static figures for planning. For up-to-date deadlines, fees, and the latest draw odds for Unit 91's specific hunt codes, check HuntPilot's Colorado state page at /states/CO and the Unit 91 page directly for the most current numbers.
Frequently Asked Questions
Is Colorado Unit 91 a draw-only unit, or is there a general season? Unit 91 has no general season. Every mule deer hunt in this unit — including hunts for antlered bucks — is limited-quota, meaning all hunters must apply through Colorado's draw system to receive a tag. There is no over-the-counter tag option for this unit.
What is harvest success like in Unit 91? Harvest success has varied significantly over the past four seasons, ranging from a low of 25% in 2025 to a high of 40% in 2024. In between, 2023 and 2022 posted success rates of 32% and 36%, respectively. Hunter numbers have also fluctuated substantially, dropping from the 650-750 hunter range in 2022-2024 down to just 291 hunters in 2025. Anyone planning a hunt here should factor in this year-to-year variability rather than expecting a consistent outcome.
How big are the mule deer in Unit 91? The counties overlapping Unit 91 have a moderate trophy history in the record books. Because trophy records are attributed at the county level rather than the unit level, that history is shared with neighboring units in the same counties, and it's not possible to say definitively how many (if any) of those trophy bucks came specifically from within Unit 91's boundaries. Overall, the data suggests moderate — not elite — trophy potential for this unit.
What is access like in Unit 91 — is it good for DIY public land hunters? Access is a real limiting factor here. Only 24% of Unit 91's roughly 49,060 acres is public land, meaning the large majority of the unit is privately held. DIY hunters without a private land arrangement, landowner permission, or a guide relationship should expect to compete for a relatively small public footprint. This is not a unit characterized by wide-open public access, and hunters should scout available public parcels carefully before applying.
Is Unit 91 worth applying for? It depends on a hunter's access situation more than anything else. The unit's moderate trophy history and draw-only structure suggest a reasonable, lower-pressure opportunity for a mature buck, but the low 24% public land figure means success is likely to hinge on private land access. Hunters with an existing access plan — family land, a lease, or a guide — have a much stronger case for applying here than hunters hoping to find success purely on public ground.