Colorado Unit S13 Bighorn Sheep Hunting Guide

Colorado Unit S13 is one of the state's limited-quota bighorn sheep units, tucked into high-elevation terrain that ranges from 6,854 feet at the valley floors up to 14,222 feet along its peaks. For hunters chasing one of the most coveted tags in North American big game hunting, S13 represents a rugged, demanding opportunity that is entirely draw-based — there is no general season here, and every hunter afield is doing so on a hard-won limited-quota tag. With 212,809 total acres, 84% public land, and 51% wilderness designation, this is a unit that rewards physical preparation and punishes anyone expecting an easy walk-in hunt.

Bighorn sheep hunting in Colorado is fundamentally different from most other big game pursuits in the state. Tags are scarce, point investment is often measured in decades, and the terrain these animals call home is uncompromising. S13 fits that mold precisely. Hunters researching this unit on HuntPilot are typically either long-time point holders finally within range of a tag or hunters trying to understand whether this specific unit deserves a spot in their application strategy. This article breaks down what the data shows — and is honest about where the data runs thin.

Hunt Structure: A Pure Draw Unit

There is no general season for bighorn sheep in S13. Every hunt here is limited-quota, meaning hunters must draw a tag before ever setting foot in the unit with a weapon in hand. The hunts available include both antlered and either-sex opportunities, which is standard for Colorado sheep management — rams are the primary draw, but hunters should always verify the specific sex designation tied to the hunt code they're considering before applying.

This limited-quota structure is typical for bighorn sheep across the West. Unlike elk or deer units where a hunter might buy an over-the-counter tag and show up, sheep hunting in Colorado requires patience, often spanning many years of unsuccessful applications before a tag materializes. S13 is no exception, and hunters should plan their sheep hunting strategy with that long horizon in mind.

Harvest Success Rates

The harvest data for S13 reflects what is typical of a true limited-quota sheep unit: extremely small hunter numbers and success rates that swing significantly year to year simply because the sample size is so tiny.

• 2025: 3 hunters, 1 harvested — 33% success
• 2024: 6 hunters, 6 harvested — 100% success
• 2023: 6 hunters, 4 harvested — 67% success
• 2022: 6 hunters, 6 harvested — 100% success
• 2021: 6 hunters, 4 harvested — 67% success
• 2019: 3 hunters, 2 harvested — 67% success

Across these six seasons, success rates have ranged from a third of hunters tagging out to the entire field connecting. This is a hallmark of sheep hunting in general — with so few tags distributed, a single hunter's outcome can swing the unit-wide percentage by double digits. The 2024 and 2022 seasons, where all six hunters harvested a ram, suggest that hunters who draw a tag in S13 and put in the scouting and physical effort have historically found success at a high rate. The 2025 season's drop to 33% is a reminder that these numbers are volatile with such a small hunter pool, and a single tough season or a run of bad weather can swing the percentage dramatically.

What this data does NOT support is any claim about trophy quality or ease of hunting beyond the raw success percentage. Hunters should treat these numbers as historical context, not a guarantee of what a given season will produce.

Tag Quota Trends

Tag numbers in S13 are about as limited as they come. The data available covers one specific hunt type, designated S-M-S13-O1-R, which shows:

• 2024: 2 tags
• 2025: 1 tag
• 2026: 3 tags

That's a 200% increase in tags from 2025 to 2026 — a notable jump, though it's worth keeping in mind that going from 1 tag to 3 tags is still an extremely small quota in absolute terms. This single hunt type is the only quota data available for S13, and hunters should not assume other hunt codes in the unit follow the same trend. Each hunt type in Colorado's sheep draw system is managed independently, and quotas for other hunts in this unit are not reflected in this trend.

The takeaway: demand for S13 tags vastly outstrips supply, as is true for nearly every bighorn sheep unit in Colorado. Hunters should check HuntPilot's unit page for the most current quota and application numbers before building a season strategy around this unit.

Trophy Quality

The counties overlapping Unit S13 carry a moderate history of trophy-class ram production. This isn't a unit with a deep, decades-long pedigree of record-book-dominating rams, but it also isn't devoid of trophy potential — moderate trophy history means hunters have a realistic, if not exceptional, chance at a quality ram if they put in the scouting time and hold out for a mature animal. Given the county-level nature of trophy record attribution, these records are shared across any neighboring units that overlap the same counties, so S13's trophy pedigree should be understood as part of a broader regional picture rather than unit-exclusive production.

Hunters drawing a tag here should not expect S13 to be a slam-dunk record-book unit, but the moderate trophy history combined with a solid historical harvest success rate suggests that patient, selective hunters can find a mature ram worth pursuing.

Access & Terrain

S13 spans a dramatic elevation gradient — from 6,854 feet to 14,222 feet — which tells hunters immediately that this unit contains everything from lower valley terrain to genuine high-alpine peaks. With 212,809 total acres, this is a sizable unit offering a lot of ground to cover, but the elevation extremes mean hunters need to be prepared for serious vertical relief and the physical demands that come with hunting sheep at altitude.

Public land accessibility is a major strength here: 84% of the unit is public land, meaning the vast majority of S13 is open to hunters without needing to negotiate private land access or landowner permission. That's a significant advantage for DIY-minded hunters, since it removes one of the biggest logistical hurdles that plagues many Western big game units.

The wilderness designation is equally significant — 51% of S13 falls within wilderness boundaries. In Colorado, wilderness designation does not carry the same guide requirement that Wyoming imposes on nonresident hunters; Colorado nonresidents are free to hunt wilderness areas without hiring an outfitter. However, hunters should understand what that wilderness percentage means practically: no motorized access, no mechanized equipment (including game carts or e-bikes), and typically longer pack-in distances to reach prime sheep habitat. Given that sheep tend to favor the most rugged, remote terrain within a unit, the high wilderness percentage here reinforces that S13 is a physically demanding hunt requiring backcountry competence, proper conditioning, and likely multi-day pack trips to access the higher basins and ridgelines where rams are most often found.

Hunters should use mapping tools — including HuntPilot's own public land and wilderness overlays — to study the unit's terrain breakdown before the season, identifying where public access roads end and foot or stock travel begins.

HuntPilot Analysis: Is S13 Worth Applying For?

For hunters building a long-term bighorn sheep strategy in Colorado, S13 deserves serious consideration, with a few caveats. The historical harvest data is encouraging — multiple seasons posting 100% or 67% success rates suggest that hunters who draw a tag here and do their homework have a strong track record of filling that tag. That's meaningful, because a drawn sheep tag represents an enormous investment of time (often a decade or more of applications) and money, and a unit with a demonstrated pattern of hunter success reduces the risk of that investment going unrewarded.

The moderate trophy history means this isn't necessarily a unit to chase purely for record-book aspirations, but it also isn't a unit where hunters should expect disappointing rams. Combined with the extremely high public land percentage (84%) and a sizable acreage base (212,809 acres) to hunt across, S13 offers genuine DIY potential for hunters willing to tackle difficult, high-elevation wilderness terrain.

The honest caveat is tag scarcity. With quotas in the single digits for the hunt type documented here, and tag numbers fluctuating from year to year, hunters need to understand that actually drawing a tag in S13 is the hardest part of this entire equation — harder than the hunt itself. This is a unit best suited to hunters who have already built meaningful point equity in Colorado's sheep draw and are looking for a unit with a reasonable track record of hunter success once that tag finally comes through. Hunters earlier in their point-building journey should treat S13 as a long-term target rather than an unrealistic near-term expectation.

How to Apply

Colorado's bighorn sheep tags are allocated entirely through the state's limited-quota draw system — there is no over-the-counter option for sheep anywhere in Colorado, and S13 is no exception. Both residents and nonresidents apply through the same centralized draw, though Colorado's point system means that cumulative weighted points significantly influence an applicant's position in the draw over time.

Because sheep tags are so limited statewide, nearly all successful applicants — resident and nonresident alike — have accumulated points over many application cycles before drawing. Colorado's system awards a portion of tags to the highest point holders, meaning a sufficiently high point total can eventually put a tag within reach, while the remainder of tags are distributed through a weighted draw where additional points improve, but don't guarantee, the odds. When a hunter does draw a tag in S13 or any other sheep unit, their accumulated points reset, so most sheep hunters are playing a very long game across their hunting careers.

Residents and nonresidents apply under separate rules and often separate pools depending on species and unit, so hunters should confirm exactly how S13 tags are allocated before committing to an application strategy. Application structures, deadlines, and fees change from cycle to cycle, so for current numbers hunters should consult HuntPilot's Colorado state page at /states/CO or the current unit page for S13 directly, where up-to-date draw odds and quota figures are maintained.

Frequently Asked Questions

What is the terrain like in Colorado Unit S13? S13 covers a dramatic elevation range from 6,854 feet to 14,222 feet across 212,809 acres, meaning hunters encounter everything from lower valley terrain to true high-alpine peaks. With 51% of the unit designated wilderness, much of the best sheep habitat requires foot or stock access rather than motorized travel, and hunters should expect steep, physically demanding country typical of high-elevation bighorn range.

What is harvest success like in Unit S13? Recent seasons have shown a wide range of outcomes given the small number of hunters afield each year. Success rates have ranged from 33% (2025) up to 100% (2024 and 2022), with 67% showing up in multiple other seasons (2023, 2021, 2019). Because only a handful of hunters draw tags each year, these percentages shift significantly based on just one or two hunters' outcomes, but the overall trend suggests hunters who draw a tag here have historically found reasonable to strong success.

How big are the bighorn sheep in Unit S13? The counties overlapping S13 carry a moderate history of trophy-class ram production. This suggests realistic potential for a quality ram for hunters willing to be selective, though it isn't an area with an exceptional or dominant trophy pedigree compared to the very best sheep units in the state. Trophy records are attributed at the county level and shared with neighboring units in the same counties.

Is Unit S13 worth applying for? For hunters with meaningful point equity in Colorado's sheep draw, yes — the harvest data shows a strong recent track record of hunters converting tags into filled licenses, the unit holds a large share of public land (84%), and trophy potential is moderate but real. The primary obstacle is tag scarcity, as quotas for documented hunt types have run as low as a single tag in recent years, making this a long-term point strategy rather than a near-term opportunity for most applicants.

Is Colorado Unit S13 a guide-required hunt for nonresidents? No. Unlike Wyoming, Colorado does not require nonresidents to hire a licensed outfitter to hunt wilderness areas. Nonresident hunters can pursue bighorn sheep in S13's wilderness terrain without a guide, though given the difficulty of the terrain and the rarity of the tag, many hunters still choose to hire local guidance to maximize their chances on a once-in-a-lifetime tag.