Colorado Unit 31 Elk Hunting Guide

Colorado Unit 31 is a limited-quota elk unit spanning 449,002 acres, with every hunt in the unit issued through the draw rather than over the counter. For hunters researching Colorado Unit 31 elk hunting, that structure matters immediately: there is no general season fallback here, and every tag — antlered or either-sex — requires a successful draw. With 63% public land and an elevation range stretching from 4,713 to 9,049 feet, the unit offers a mix of lower foothill country and higher timbered terrain, all accessible without wilderness restrictions since the unit carries 0% wilderness designation.

This is a unit that draws attention from hunters who want a limited-draw hunting experience without the complications of wilderness access rules or stock-dependent logistics. But "limited-quota" doesn't automatically mean "trophy unit," and hunters need to look at the actual harvest and herd data before committing points or application dollars to Unit 31.

HuntPilot Analysis: Is Unit 31 Worth Applying For?

The honest answer depends heavily on what a hunter is after. Harvest data pulled via HuntPilot shows a unit that produces real opportunity but inconsistent demand pressure year to year. In 2025, Unit 31 saw a massive jump in hunter numbers — 10,296 hunters afield compared to 3,194 in 2024 and 3,133 in 2023 — while success rate actually dropped slightly to 25% from 28% the year before. That's a significant swing in hunter volume without a corresponding bump in success, which suggests either a change in how hunts were allocated across the unit that year or an influx of hunters pursuing a specific draw bucket. Hunters should treat 2025 as an outlier year worth watching rather than a new baseline, and lean more on the 2023–2024 pattern of roughly 3,100-3,200 hunters posting success in the mid-to-high 20% range as the more representative picture.

On the herd health side, the bull:cow ratio averaged 23:100 across six survey years from 2018 to 2024. That is a low ratio by elk management standards and signals a bull-heavy harvest pressure relative to the cow population, or a unit management objective skewed toward maximizing hunter opportunity over maintaining a high bull carryover. Hunters expecting bull-dense country based on reputation alone should recalibrate: this ratio points to a unit where mature bulls are not overly abundant relative to cows, even though overall harvest numbers look solid.

Trophy potential here is best described as moderate. The counties overlapping Unit 31 carry a moderate history of trophy-class entries, meaning hunters have taken quality bulls from this area over time, but it is not a unit defined by consistent record-book production. Given that record-book entries are logged by county rather than by hunt unit, that trophy history is shared with neighboring units that overlap the same counties — it is not an exclusive indicator of what Unit 31 itself is producing. Hunters chasing a genuine trophy bull should view Unit 31 as a solid opportunity unit with occasional trophy potential, not a unit to burn years of points on purely for antler quality.

Where Unit 31 earns its keep is accessibility. At 63% public land, the majority of the unit is open to hunters without needing to negotiate private leases or landowner permission, and the absence of wilderness designation means no stock, no multi-day pack-ins required by regulation, and no additional guide requirements tied to wilderness boundaries. The elevation range — from under 4,800 feet up to just over 9,000 — gives hunters options to hunt lower foothill transition zones early and push into higher timber as conditions dictate.

Bottom line: Unit 31 is worth applying for if the goal is a solid elk hunting experience with real harvest odds and accessible public land, especially for hunters who already have the points or application history to get drawn. It is not the unit to chase if trophy score is the primary objective — the data supports "good hunt," not "record-book guarantee."

Harvest Success Rates

Unit 31's recent harvest data shows meaningful opportunity, but with notable year-to-year variability that hunters should factor into expectations:

• 2025: 10,296 hunters, 2,582 harvested, 25% success
• 2024: 3,194 hunters, 907 harvested, 28% success
• 2023: 3,133 hunters, 751 harvested, 24% success

The 2024 season posted the strongest success rate of the three years at 28%, with a hunter population in the low 3,000s — a figure much more in line with 2023's 3,133 hunters and 24% success. The 2025 spike to over 10,000 hunters afield, while still producing a respectable 25% success rate and the highest total harvest number (2,582 elk) of the three years, represents a clear departure from the prior pattern. Hunters evaluating this unit should understand that success rates in the mid-to-high 20% range have been the norm, and should dig into HuntPilot's current unit page to see which specific hunt codes are driving the increased 2025 pressure before assuming that volume will repeat going forward.

Trophy Quality

Trophy data for the counties overlapping Unit 31 points to a moderate trophy history — meaning the area has produced trophy-class bulls over the years, but not at a volume or consistency that marks it as an elite producer. Because record-book entries are attributed to the county rather than the specific hunt unit, this trophy history is shared with any other units that overlap the same counties; it should be read as a regional indicator rather than proof of what Unit 31 alone is capable of producing.

Combined with the 23:100 bull:cow ratio observed across recent survey years, the picture that emerges is a unit with decent elk density and real harvest opportunity, but limited carryover of mature bulls compared to units managed more conservatively for trophy quality. Hunters whose primary goal is tagging a mature bull with exceptional antler mass or score should treat Unit 31 as a secondary option rather than a primary trophy destination, while hunters focused on a solid, representative elk hunt with a fair shot at a respectable bull will find more alignment with what this unit's data actually supports.

Herd Health & Population Trends

The survey data available for Unit 31 covers six years between 2018 and 2024, with an average bull:cow ratio of 23:100. This is a low ratio relative to many western elk units and suggests a herd structure where cows significantly outnumber bulls — a common outcome in units managed with liberal either-sex or antlered harvest opportunity through the draw system, paired with lower bull survival to maturity.

For hunters, a 23:100 ratio doesn't necessarily mean elk are scarce — harvest numbers show elk are being killed in solid numbers every year — but it does mean that bulls, and particularly older-age-class bulls, make up a smaller share of the herd than cows. This reinforces the trophy assessment above: Unit 31 is better framed as an opportunity unit than a trophy unit based on the available survey data. Hunters should not expect bull-heavy sightings in the field and should plan accordingly, covering more ground and glassing more animals to find a shooter bull among a cow-dominant population.

Access & Terrain

Unit 31 spans 449,002 acres with an elevation range from 4,713 to 9,049 feet, giving hunters a considerable vertical range to work with depending on season timing and elk movement. The 63% public land figure means the majority of the unit is open to public access, which is a meaningful advantage for DIY hunters who don't want to navigate private land leases or seek landowner permission to hunt.

With 0% wilderness designation, hunters are not restricted by wilderness travel regulations, and there's no requirement — as there would be in a Wyoming wilderness unit — for nonresidents to hire a guide. This makes Unit 31 more approachable for self-guided hunters who want to scout and hunt on their own terms, using vehicle or foot access across the public land base rather than committing to pack-in logistics.

The elevation spread suggests lower foothill and transitional terrain in the 4,700–6,000 foot range, climbing into higher timbered and possibly subalpine terrain as elevation approaches 9,000 feet. Hunters planning a scouting trip should use HuntPilot's mapping tools to overlay the public land boundaries against elevation bands and identify likely elk habitat — benches, timbered pockets, and water sources — within the accessible public portions of the unit, rather than relying on generic assumptions about where elk concentrate.

How to Apply

Colorado operates a true preference point draw system for elk, meaning the highest point holders in the applicant pool draw first — a high enough point total can functionally guarantee a tag on a given hunt. This is different from a weighted lottery; Colorado's system is sequential by points, not random chance scaled by points.

Unit 31 has no general season — every hunt here, including hunts for antlered and either-sex elk, is issued exclusively through the limited-quota draw. There is no over-the-counter fallback option for hunters who don't draw a tag in this specific unit. Residents and nonresidents apply through separate pools, and nonresidents should expect more competitive draw conditions than residents given Colorado's allocation structure.

Because Unit 31 is fully limited-quota, hunters serious about hunting this unit should begin tracking their point status now and build a multi-year application strategy, understanding that a successful draw will consume accumulated points and require rebuilding from zero for future attempts. Application dates, fees, and current draw odds by hunt code change every cycle — for the latest numbers, deadlines, and the most current draw odds breakdown for Unit 31, see HuntPilot's Colorado page at /states/CO.

Frequently Asked Questions

Is Colorado Unit 31 worth applying for? Based on available data, yes — with realistic expectations. Harvest success has run between 24% and 28% in recent years (except for a 2025 spike in hunter volume), and 63% public land makes the unit accessible for DIY hunters. However, the moderate trophy history and a 23:100 bull:cow ratio mean hunters should view this as a solid opportunity unit rather than a trophy destination.

What is harvest success like in Unit 31? Success rates were 25% in 2025, 28% in 2024, and 24% in 2023. The 2024 and 2023 figures, with hunter counts around 3,100-3,200, represent the more consistent baseline; 2025's jump to over 10,000 hunters is an outlier worth investigating further on HuntPilot before assuming it reflects ongoing conditions.

How big are the elk in Unit 31? Trophy records from the counties overlapping Unit 31 show a moderate history of trophy-class bulls, but that history is shared across neighboring units in the same counties and isn't unique to Unit 31. Combined with a low bull:cow ratio of 23:100 across recent surveys, hunters should expect decent elk density but limited numbers of mature, trophy-class bulls relative to the overall herd.

What is the terrain like in Unit 31? The unit covers elevations from 4,713 to 9,049 feet across 449,002 acres, with 63% public land and no wilderness designation. This suggests a mix of lower foothill terrain and higher timbered country, accessible to hunters without the travel restrictions or guide requirements associated with wilderness areas.

Does Unit 31 have a general season for elk? No. Every hunt in Unit 31, including hunts for antlered and either-sex elk, is issued through Colorado's limited-quota draw. There is no over-the-counter or general season option in this unit — hunters must draw a specific tag to hunt here.