Colorado Unit 100 Mule Deer Hunting Guide

Colorado Unit 100 sits in the state's low-elevation country, ranging from 4,232 to 5,004 feet across 678,174 acres. For mule deer hunters digging into unit-level data before committing points or planning a trip, Unit 100 presents a unique profile: a fully limited-quota structure, modest public access, and harvest numbers that have swung considerably from year to year. This article breaks down what the data actually shows so hunters can decide whether this unit belongs on their short list.

Unlike units with a walk-in general season, every mule deer hunt in Unit 100 is limited-quota — there is no general season option here. That means every hunter in the field, regardless of residency, has gone through a draw to be there. This immediately changes the calculus for anyone used to buying an over-the-counter tag and showing up; in Unit 100, the draw is the only door in.

HuntPilot Analysis: Is Unit 100 Worth Applying For?

The honest answer depends heavily on what a hunter is after. Unit 100's public land sits at just 6%, meaning the overwhelming majority of the unit's 678,174 acres is privately held. For DIY hunters hoping to walk onto public ground and start glassing, this is a serious limiting factor — access will likely require either drawing a tag tied to walk-in access programs, securing private land permission, or working with a landowner/outfitter arrangement. This is not a unit where hunters should expect to freelance across open public tracts.

Harvest data over the past five years tells a story of real variability. In 2025, 1,602 hunters pursued deer in Unit 100 and posted a 40% success rate with 640 animals harvested — a dramatic jump in both hunter numbers and total harvest compared to prior years. Going back further, 2024 saw just 339 hunters with a 60% success rate (202 harvested), 2023 produced 363 hunters at a 33% success rate (119 harvested), 2022 saw 369 hunters at 52% success (192 harvested), and 2021 logged 371 hunters at 57% success (210 harvested). The sharp increase in hunter numbers in 2025 — nearly 4.5 times the hunter count of the prior four years combined on an annual basis — alongside a drop in success rate to 40% suggests either a significant change in tag allocation or a shift in how hunts are structured that pushed far more hunters into the field. Hunters should treat the 2025 numbers as a notable outlier worth investigating further on the current HuntPilot unit page before building expectations around them.

Herd health data is thin here, drawn from a single survey year (2024), which showed a buck:doe ratio of 35:100. That single-year ratio is within a biologically normal range for mule deer, but with only one year of data available, it's not enough to establish a trend. Hunters should not read too much into one survey cycle — a longer run of data would be needed to say whether the herd is stable, growing, or declining.

On trophy potential, the counties overlapping Unit 100 carry a limited history of trophy-class record entries. That doesn't rule out a mature buck turning up, but it does mean hunters should not walk into this unit expecting it to be a well-documented trophy factory. Given the thin public land base and limited trophy pedigree, Unit 100 reads less like a dedicated trophy-hunt destination and more like a unit where success depends heavily on access — namely, whether a hunter has a private land connection or can navigate the limited public ground effectively.

Taken together: Unit 100 is worth applying for if a hunter already has access lined up (private land, landowner vouchers, or a guide/outfitter relationship) and is comfortable with a limited-quota structure. For a hunter with zero access plan and no points to burn, the 6% public land figure alone should give serious pause.

Harvest Success Rates

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

• 2025: 1,602 hunters, 640 harvested, 40% success
• 2024: 339 hunters, 202 harvested, 60% success
• 2023: 363 hunters, 119 harvested, 33% success
• 2022: 369 hunters, 192 harvested, 52% success
• 2021: 371 hunters, 210 harvested, 57% success

From 2021 through 2024, hunter numbers stayed fairly consistent in the 339–371 range, while success rates bounced between 33% and 60% — a wide spread for a limited-quota unit where tag numbers theoretically stay more controlled. The 2023 season stands out as the toughest year in this window, with success dropping to 33% despite a similar hunter count to surrounding years. Then 2025 broke the pattern entirely, with hunter numbers spiking to 1,602 — more than four times any other year in the dataset — while success fell to 40%. This kind of jump typically reflects a change in how many tags were issued or how hunts were counted that season, and hunters evaluating Unit 100 should check HuntPilot's current data for the latest breakdown before assuming 2025 reflects the new normal.

Trophy Quality

Trophy records tied to the counties overlapping Unit 100 are limited. This doesn't mean a quality buck can't be taken here, but the available history doesn't support characterizing this as a unit with strong or exceptional trophy production. Hunters chasing a record-book-caliber buck would be better served looking at units with a deeper, more consistent trophy history. For Unit 100, the realistic expectation should center on a representative, mature mule deer rather than a unit-defining trophy hunt. Given the limited public land and thin trophy data, hunters pursuing a true trophy objective should weigh whether their points are better spent elsewhere, while hunters prioritizing the overall hunt experience and willing to work through access challenges may still find a solid buck.

Herd Health & Population Trends

The only survey data available for Unit 100 comes from a single year, 2024, showing a buck:doe ratio of 35:100. This ratio falls within a normal biological range and doesn't raise red flags on its own, but one year of data is not enough to call a trend. Hunters should be cautious about drawing conclusions on herd trajectory from this single data point — a herd could be stable, recovering, or declining, and a single survey year can't distinguish between those scenarios. Anyone seriously considering Unit 100 should watch for updated survey data in subsequent years to see whether the ratio holds, improves, or drops.

Access & Terrain

Unit 100 spans low elevations, from 4,232 to 5,004 feet, across 678,174 total acres. This is comparatively low country relative to many Colorado mule deer units, which often run into much higher alpine terrain. Lower elevation can mean earlier access in the season and less reliance on snow-driven movement to put deer in reach, though hunters should verify current terrain conditions directly given the limited data available beyond elevation and acreage.

The dominant access story for Unit 100, however, is land ownership. With only 6% of the unit classified as public land, the vast majority of the acreage is private. This is a critical factor: Unit 100 is not a unit where hunters can expect to show up, find a trailhead, and hunt open public ground at will. Successful hunts here will typically depend on some form of private land access — whether through personal connections, landowner permission programs, or a guide. Hunters without an access plan should not assume they'll be able to improvise access once they arrive. There is no wilderness acreage reported for this unit, so wilderness-specific access rules do not apply here.

Given this combination — low public land percentage and a fully limited-quota hunt structure — Unit 100 is best suited to hunters who have already solved the access puzzle before they ever submit an application.

How to Apply

Every mule deer hunt in Colorado Unit 100 operates through the state's limited-quota draw system — there is no general season option, so hunters cannot simply buy an over-the-counter tag and go. Both residents and nonresidents must apply through Colorado's draw process to hunt deer in this unit.

Colorado's draw system is a true preference-point structure, not a weighted lottery. Point holders with the highest accumulated preference points draw first, meaning a sufficiently high point level can effectively guarantee a tag on many hunts. Residents and nonresidents apply within separate pools, so competition levels differ by residency even for identical hunts.

Because Unit 100 issues all of its deer tags through this draw, prospective applicants should plan around building preference points if they don't already hold a competitive number for this specific hunt. Application structure, resident versus nonresident procedures, and point requirements can shift from year to year, so hunters should consult HuntPilot's Colorado state page for the current application windows, fees, and draw odds before applying. Application dates and fees change every cycle — for the current deadlines, fees, and draw data, see HuntPilot's Colorado page at /states/co.

Frequently Asked Questions

Is Colorado Unit 100 worth applying for as a mule deer hunter? It depends on access. With only 6% public land, most of Unit 100 is privately held, so hunters without a landowner connection, voucher, or guide arrangement will face real access limitations. Harvest success has also varied widely, from 33% to 60% over recent years, with a notable spike in hunter numbers and a drop to 40% success in 2025. Hunters with secured access and reasonable expectations can do well here; those hoping to freelance on public land should look elsewhere.

What is harvest success like in Unit 100? Success rates have ranged from a low of 33% (2023) to a high of 60% (2024) over the past five years. The most recent year, 2025, saw a major jump in hunter participation (1,602 hunters) alongside a 40% success rate, a notable departure from the more modest hunter counts (339–371) seen from 2021 through 2024.

How big are the mule deer in Unit 100? Trophy records from the counties overlapping Unit 100 are limited, meaning this unit doesn't carry a strong documented history of producing record-book-caliber bucks. Hunters should set realistic expectations around a mature, representative buck rather than targeting this unit specifically for trophy potential.

What is the terrain like in Unit 100? The unit sits at relatively low elevation, ranging from 4,232 to 5,004 feet across 678,174 acres. There is no wilderness acreage reported in this unit, and with only 6% public land, the terrain hunters can actually access is a small fraction of the unit's total footprint.

Does Unit 100 have a general mule deer season? No. Every mule deer hunt in Unit 100 is limited-quota — there is no general season option. All hunters, resident and nonresident, must draw a tag through Colorado's limited-quota draw system to hunt deer here.