Colorado Unit 99 Mule Deer Hunting Guide

Colorado Unit 99 is a limited-quota mule deer unit spanning 1,058,370 acres in eastern Colorado's plains country, where every hunt for this species is allocated through the draw — there is no general season here. That single fact shapes everything about how hunters should approach this unit: tags are controlled, hunter numbers are managed, and the entire opportunity runs through Colorado's draw system. With elevations ranging from just 4,221 to 5,554 feet, Unit 99 sits well below the alpine and foothill terrain many Colorado mule deer hunters are used to, offering a distinctly different style of open-country hunting.

This is flat, exposed country by Colorado standards, and that terrain reality — combined with only 6% public land — makes Unit 99 a unit that rewards careful planning rather than spontaneous DIY scouting trips. Hunters who draw a tag here need to understand the access picture, the herd data, and realistic trophy expectations before investing time and travel into this part of the state.

Herd Health & Population Trends

The most recent survey data available for Unit 99, collected in 2024, shows a buck:doe ratio of 35:100. That figure comes from a single survey year, which limits the ability to identify a longer-term trend, but a ratio in the mid-30s per 100 does suggest a population where mature bucks are present but not abundant relative to the doe population. Hunters should treat this as a baseline data point rather than a definitive picture of herd quality, since one year of survey data can't confirm whether the ratio is improving, declining, or holding steady over time. Without additional survey years to compare against, it's worth checking HuntPilot's unit page periodically for updated survey figures as Colorado Parks and Wildlife continues to collect data in this unit.

Harvest Success Rates

Unit 99 has produced some of the more variable harvest numbers among Colorado's limited-quota deer units in recent seasons, and the swings are worth understanding before applying.

• 2025: 1,847 hunters, 761 harvested — 41% success
• 2024: 854 hunters, 409 harvested — 48% success
• 2023: 974 hunters, 320 harvested — 33% success
• 2022: 929 hunters, 411 harvested — 44% success

Two things stand out. First, success rates have bounced between 33% and 48% over four seasons, which is a wide range for a single unit and suggests that weather, deer distribution, and hunting pressure can materially affect outcomes year to year. Second, hunter numbers jumped sharply in 2025 — more than doubling from 2024's 854 hunters to 1,847 — while success dropped from 48% to 41%. That combination (more hunters, lower success) is a pattern worth watching, since it may indicate tag numbers were increased faster than the herd could comfortably absorb additional pressure. Prospective applicants should factor this volatility into their expectations rather than assuming the most recent or the best year is representative.

Trophy Quality

Trophy data for the counties overlapping Unit 99 points to a moderate history of trophy-class production. This isn't a unit with an extensive or standout trophy pedigree, but there is a documented history of trophy-quality bucks coming from this general area over time. As with any unit assessment based on county-level records, it's important to understand that these entries are attributed to the broader county boundaries rather than to Unit 99 specifically — the same records are shared with neighboring units that overlap the same counties, and the animals recorded could have been taken anywhere within that shared footprint.

Given the open, low-cover terrain described by hunters who've drawn this tag, mature bucks in Unit 99 likely rely on subtle terrain features — drainages, isolated tree cover, and distance from access points — to reach maturity rather than dense timber or rugged elevation change. Hunters chasing a genuine trophy-class buck here should treat this as a unit with real but modest trophy potential, not a marquee trophy destination, and should calibrate their expectations accordingly.

Access & Terrain

Access is the single biggest challenge in Unit 99, and hunters need to internalize this before they draw a tag. Public land makes up only 6% of the unit's 1,058,370 acres, meaning the overwhelming majority of this unit is private property. That is a critical distinction from many western hunting units where DIY hunters can range widely across public ground — in Unit 99, the public land footprint is small enough that hunters will need to plan meticulously around what's actually accessible, whether that's public parcels, state trust land, or negotiated access to private ground.

Forum accounts from hunters who've drawn tags here describe the character of the available public and state trust land clearly: mostly open space with very little cover, punctuated by isolated features like a stream with some tree lining or a lake with a heavier stand of trees. That's meaningfully different terrain than the river-bottom or timbered cover many hunters are accustomed to, and it means deer sightings can be sparse and unpredictable. Hunters accustomed to still-hunting through cover will need to adjust their strategy toward long-range glassing and patience, since the open terrain offers little concealment for either the hunter or the deer.

The unit's elevation band (4,221–5,554 feet) confirms this is plains and prairie-breaks country rather than mountain terrain — there's no wilderness designation in this unit, and hunters shouldn't expect the kind of vertical relief or backcountry pack-in access common in Colorado's western mule deer units. This is a unit where success depends far more on knowing which small pockets of cover and water concentrate deer activity than on physical conditioning or wilderness navigation skills.

HuntPilot Analysis: Is Unit 99 Worth Applying For?

Unit 99 is a unit that demands realistic expectations. On the positive side, it is a 100% limited-quota unit, meaning Colorado Parks and Wildlife controls hunter density through the draw rather than allowing open enrollment — that's a meaningful advantage over general units where crowding can be unpredictable. The harvest data also shows that success is achievable, with three of the last four years posting success rates at or above 41%.

On the negative side, the access situation is genuinely difficult. With only 6% public land, most hunters drawing this tag will need a plan for either state trust land access, walk-in access programs, or negotiated private land permission — DIY hunters expecting to roam freely across public ground will be disappointed. The terrain itself, as described by hunters who've hunted it, offers little natural cover, which raises the difficulty of pattern-and-stalk hunting considerably. Add to that a single year of survey data showing a 35:100 buck:doe ratio — not alarming, but not indicative of an exceptional herd either — and a moderate (not standout) trophy history in the surrounding counties, and Unit 99 emerges as a unit best suited to hunters who value the near-guarantee of a controlled hunt environment over hunters chasing a marquee trophy opportunity.

Data on this unit is tracked through HuntPilot, and hunters weighing whether to apply should treat Unit 99 as a legitimate but challenging option — worth pursuing for hunters willing to do serious homework on the limited public and state trust parcels available, but not a unit to draw blind and expect an easy, high-volume public-land hunt. The sharp jump in hunter numbers in 2025 alongside a drop in success rate is also worth monitoring; if that trend continues, competition for the limited accessible ground could intensify in future seasons.

How to Apply

Because Unit 99 offers no general season for mule deer, every hunter pursuing this species here must go through Colorado's limited-quota draw system. There is no walk-in or over-the-counter path into this unit — a hunter's only way to hunt Unit 99 is to apply for and draw one of the limited-quota licenses issued specifically for this unit.

Colorado's draw operates on a preference point system, and residency plays a significant role in the application structure. Residents and nonresidents apply through separate pools, and Colorado's system awards a portion of tags to the highest point holders while distributing the remainder through a weighted random draw — meaning accumulated preference points meaningfully improve a hunter's position over time, though the exact odds depend on point levels and the specific hunt code applied for. Nonresidents should expect this to be a multi-year points strategy for the more competitive hunt options within this unit, while residents may find certain hunt codes more approachable depending on demand.

Because application windows, license fees, and draw odds are updated annually and change from cycle to cycle, hunters should not rely on secondhand or historical numbers when planning an application. For current deadlines, license costs, and draw odds specific to Unit 99, visit HuntPilot's Colorado state page at /states/co or the unit's dedicated page for the most current data available.

Frequently Asked Questions

What is the terrain like in Colorado Unit 99? Unit 99 sits at a relatively low elevation for Colorado, ranging from 4,221 to 5,554 feet, and consists largely of open plains-style country with minimal natural cover. Hunters who have drawn tags here describe the available public and state trust parcels as mostly open space, with isolated exceptions like a stream corridor or lake area that hold denser tree cover. There is no wilderness designation in this unit, and it lacks the mountainous or heavily timbered terrain found in many of Colorado's western mule deer units.

What is harvest success like in Unit 99? Success rates have varied considerably in recent seasons, ranging from a low of 33% in 2023 to a high of 48% in 2024. The 2025 season saw a large increase in hunter numbers (1,847, up from 854 in 2024) accompanied by a drop in success to 41%, suggesting that increased hunting pressure may be affecting outcomes. Hunters should view any single year's success rate with caution given this variability.

How big are the mule deer in Unit 99? Trophy data for the counties overlapping this unit indicates a moderate history of trophy-class bucks, meaning some notable deer have come from this general area but it isn't a unit with an extensive or standout trophy record. Given the open terrain and limited public access, mature bucks in this unit likely depend on isolated cover and distance from hunting pressure to reach trophy size, making them harder to locate but not unheard of.

Is Colorado Unit 99 worth applying for? It depends on what a hunter is looking for. Unit 99 offers controlled hunter density through its limited-quota draw structure and has posted respectable success rates in most recent years, but the combination of only 6% public land and open, low-cover terrain makes it a genuinely challenging unit for DIY hunters. It's a reasonable option for hunters willing to research access carefully and adjust their tactics to open-country hunting, but it isn't a slam-dunk pick for hunters expecting abundant public land or a heavy trophy pedigree.

What should hunters know about accessing public land in Unit 99? With only 6% of the unit classified as public land, the vast majority of Unit 99 is privately held. Hunters should not expect to freely roam public ground the way they might in units with higher public land percentages. Instead, successful hunters will need to identify specific accessible parcels — including state trust land — well before their hunt begins, since the limited cover and open terrain mean deer distribution across those parcels can be unpredictable.