Colorado Unit 100 Pronghorn Antelope Hunting Guide

Colorado Unit 100 sits in the eastern plains country, a low-elevation unit ranging from 4,232 to 5,004 feet across 678,174 acres. For hunters researching this unit specifically for pronghorn, it's worth understanding upfront what kind of hunt this is: a limited-quota draw unit through and through, with no general season fallback, set in a landscape where public access is the exception rather than the rule.

This is a unit that rewards patience in the application process and careful pre-season planning once a tag is in hand. With only 6% public land across its nearly 680,000 acres, the math is straightforward — the vast majority of Unit 100 is private ground, and hunters drawing a tag here need a plan for access well before opening day. That reality shapes nearly every piece of advice that follows.

HuntPilot Analysis: Is Unit 100 Worth Applying For?

The harvest numbers out of Unit 100 tell a story of a healthy, huntable pronghorn population with solid success rates, even as hunter numbers have fluctuated year to year. In 2025, 232 hunters took to the field and 130 tagged out, a 56% success rate. That's actually the lowest success rate in the five-year window provided, which included a notably stronger 2021 (76% success among 188 hunters) and 2022 (74% success among 116 hunters). The 2023 season dipped to 53% success among just 103 hunters, while 2024 rebounded to 63% success among 104 hunters.

Looking at the full five-year picture, success rates have ranged from 53% to 76%, which is a meaningful spread but still reflects a unit where more than half of hunters connect in most years. The jump in hunter numbers in 2025 (more than double several prior years) alongside a success-rate dip is worth noting — more pressure on the same pronghorn population can translate to lower per-hunter success, and hunters should factor that into expectations if tag numbers continue trending upward.

On trophy potential, the counties overlapping Unit 100 carry a moderate history of trophy-class pronghorn production. This isn't a unit with a thin or absent trophy record, but it's also not among the elite producers in the state. Hunters should treat it as a credible option for a quality buck without expecting it to be a slam-dunk trophy destination. As with all pronghorn units, trophy-class bucks in the area have been documented, but they are not the norm — most tags here are filled by solid, representative bucks rather than exceptional ones.

The wildlife survey data adds a note of caution rather than celebration. Across six survey years from 2018 to 2024, the average buck:doe ratio sits at 32:100. That's a modest ratio by pronghorn standards and suggests a population structure that favors does over mature bucks relative to some other Colorado units. This is useful context for setting expectations: Unit 100 is a numbers-and-access unit more than a ratio-driven trophy unit, and hunters should weigh that alongside the moderate trophy history noted above.

So is it worth applying for? For hunters who prioritize a reasonable shot at filling a tag and are willing to do the legwork on private land access, the harvest data supports a yes. For hunters chasing a top-tier trophy buck above all else, Unit 100 is a credible but not standout choice — the moderate trophy history and modest buck:doe ratio suggest looking at HuntPilot's broader unit comparisons before locking in Unit 100 as a first choice for trophy potential alone.

Access & Terrain

The defining characteristic of Unit 100 for hunters is its land ownership pattern: just 6% of the unit is public land, with zero percent wilderness. That means roughly 94% of the unit's 678,174 acres is privately held. This is below the threshold where DIY hunters can expect to find ample public access, and it should shape every hunter's pre-season approach.

Practically, this means hunters drawing a tag in Unit 100 need to either secure permission on private land, identify and scout the limited public parcels well in advance, or budget for a guided or access-fee hunt. The elevation profile here — a tight band between 4,232 and 5,004 feet — reflects classic eastern plains pronghorn country: open, low-relief terrain well suited to glassing and spot-and-stalk tactics, but also terrain where fences and property lines dictate where a hunter can and cannot go.

Given the public land percentage, this unit is not one where hunters should expect to show up and find open country to wander. Scouting efforts should focus heavily on identifying the specific public parcels within the unit boundary — whether BLM, state trust, or other public tracts — using mapping tools before the season opens. HuntPilot's public land overlay and mapping features are built for exactly this kind of pre-season homework, letting hunters pin known public boundaries and build a realistic access plan rather than guessing in the field.

Harvest Success Rates

The five-year harvest record for Unit 100 shows meaningful year-to-year variation:

• 2025: 232 hunters, 130 harvested, 56% success
• 2024: 104 hunters, 66 harvested, 63% success
• 2023: 103 hunters, 55 harvested, 53% success
• 2022: 116 hunters, 86 harvested, 74% success
• 2021: 188 hunters, 142 harvested, 76% success

Averaged across these five seasons, success rates have generally clustered in the mid-50s to mid-70s percent range, with the two strongest years (2021 and 2022) both exceeding 70%. The two most recent years, 2023 and 2025, came in lower, in the mid-50s. Hunter participation has swung significantly too — from a low of 103 hunters in 2023 to 232 in 2025 — which suggests tag numbers or draw demand may be shifting, and hunters should check HuntPilot's current draw odds page for this unit to understand the latest tag allocation picture before applying.

The overall takeaway: Unit 100 has historically been a unit where more than half of hunters fill their tag, with multiple years exceeding a 70% success rate. That's a solid baseline for a limited-quota pronghorn unit, even accounting for the recent softening in success percentage.

Trophy Quality

Trophy records from the counties overlapping Unit 100 reflect a moderate history of production. This places Unit 100 in a middle tier — not a unit known for consistently throwing exceptional or elite-class bucks, but also not a unit devoid of trophy history. Hunters pursuing a wall-worthy buck here should recognize that quality animals have come from this broader area, but they represent the exception rather than the rule.

Combined with the average buck:doe ratio of 32:100 recorded across six survey years (2018–2024), the data points toward a unit where hunters should set realistic expectations: a good chance at filling a tag with a representative buck, with trophy-class animals possible but not the expected outcome. Hunters specifically chasing a top-end trophy may want to compare Unit 100 against neighboring units with stronger buck:doe ratios or more robust trophy histories using HuntPilot's unit comparison tools before committing points to this unit.

Herd Health & Population Trends

The survey data available for Unit 100 spans six years from 2018 to 2024, with an average buck:doe ratio of 32:100. This is a modest ratio that suggests the herd skews toward does relative to bucks in the available age classes, a pattern worth factoring into expectations for both trophy potential and future tag availability.

Without year-by-year ratio data to compare, hunters should treat the 32:100 average as the most reliable indicator of herd structure over this period rather than looking for a single standout year. A ratio in this range is not unusual for pronghorn units under consistent hunting pressure, but it does reinforce that this unit functions more as a solid opportunity unit than a ratio-driven trophy unit.

How to Apply

Unit 100 operates entirely on a limited-quota draw basis — there is no general season or over-the-counter option here. Every hunter pursuing pronghorn in this unit, resident or nonresident, must apply through Colorado's draw system and be awarded a tag before stepping into the field.

Colorado's pronghorn draw uses a preference point system, meaning hunters who apply but don't draw accumulate a point that improves their position in future draws. Colorado's draw is a true preference system — the highest point holders in a given hunt code draw first, which means a sufficient point total can put a unit within reach, though exact point levels needed shift from year to year based on tag quotas and applicant demand. Residents and nonresidents apply through separate pools, and nonresident tag allocations are typically more limited than resident allocations, so nonresidents should expect a longer point-building horizon for the same unit.

Hunters should also know that a successful draw consumes accumulated points for that species, meaning point totals reset after a tag is awarded and must be rebuilt for future applications.

Because application structures, point requirements, and tag quotas shift from cycle to cycle, hunters should not rely on historical point totals alone when deciding whether to apply. For the most current application windows, fees, and draw odds for Unit 100, visit HuntPilot's Colorado page at /states/CO, where application details are kept current for each draw cycle.

Frequently Asked Questions

What is the terrain like in Colorado Unit 100? Unit 100 sits at a relatively low elevation band of 4,232 to 5,004 feet, characteristic of eastern plains pronghorn habitat — open, gently rolling country well suited to glassing and spot-and-stalk hunting. The terrain itself isn't the main challenge for hunters here; access is. With public land making up only 6% of the unit, most of this open country sits behind private fences, and hunters need a firm access plan before the season starts.

What is harvest success like in Unit 100? Success rates over the past five years have ranged from 53% to 76%, with 2025 coming in at 56% success among 232 hunters. Three of the last five years have seen success rates at or above 63%, making this a generally productive unit for hunters who secure access, even though the two most recent full-data years (2023 and 2025) have trended toward the lower end of that range.

How big are the pronghorn in Unit 100? Trophy records from the counties overlapping this unit reflect a moderate trophy history — quality bucks have come from this area, but it is not known as a top-tier trophy producer. The average buck:doe ratio of 32:100 recorded across recent survey years further suggests a herd structure geared more toward opportunity than exceptional horn growth. Hunters should set expectations around a solid, representative buck rather than planning specifically around a trophy-class animal.

Is Unit 100 worth applying for? For hunters focused on a reasonable chance at filling a tag, yes — the five-year harvest data shows success rates frequently above 60%, and multiple years above 70%. The caveat is access: with only 6% public land, hunters need to line up private land permission or identify the limited public parcels well before the season. Hunters chasing a top trophy specifically may want to weigh Unit 100 against other Colorado units with stronger trophy records before committing preference points here.

Does Unit 100 have a general pronghorn season? No. Every pronghorn hunt in Unit 100 is limited-quota and allocated through Colorado's draw system. There is no over-the-counter or general season option for this unit, so hunters must successfully draw a tag through the preference point process to hunt here.