Arizona Unit 13A Bighorn Sheep Hunting Guide
Arizona Unit 13A sits in the far northwest corner of the state, a sprawling 1,241,702-acre unit defined by extreme elevation change — from just 1,614 feet near the Colorado River drainage up to 7,995 feet at its highest points. This vertical relief, combined with 95% public land ownership, makes 13A one of the most significant desert bighorn sheep units in Arizona's limited-quota system. For hunters chasing one of the toughest tags to draw in North American big game hunting, Unit 13A deserves serious attention.
Every bighorn sheep hunt in this unit runs through Arizona's limited-quota draw system — there is no general season option for this species anywhere in the state, and 13A is no exception. That means every hunter afield here has gone through a competitive application process, and the tag itself represents a rare opportunity most applicants will spend a decade or more pursuing before they ever unroll a sleeping bag in this country.
This article breaks down what the data actually shows about Unit 13A — harvest patterns, herd composition, terrain, and trophy potential — so hunters can make an informed decision about whether to prioritize this unit in their application strategy.
HuntPilot Analysis: Is Unit 13A Worth Applying For?
For desert bighorn sheep hunters, the question isn't really "is this unit worth applying for" in the way it might be for an elk or deer unit with OTC alternatives. Every sheep tag in Arizona is precious, and 13A is one of the units that consistently produces for the small number of hunters who draw it.
The harvest numbers tell a clear story of a genuinely limited-quota hunt. In 2025, 2024, and 2023, the unit saw exactly one hunter and one harvest each year — 100% success in all three seasons. That's not a coincidence; it reflects how Arizona manages desert bighorn sheep tags: extremely low quotas, matched with hunters who have often waited years and done extensive scouting before ever stepping into the field. A single-hunter, single-tag season with 100% success across three straight years indicates a well-managed, sustainable harvest model rather than a unit under pressure.
The outlier is 2022, when unit-wide data shows 18 hunters and 200 harvested animals, producing a reported success rate over 1,000%. That figure is almost certainly the product of multiple hunt types or species categories being aggregated into a single unit total for that year rather than a literal reflection of bighorn sheep-specific harvest — hunters should treat that year's raw number with caution and lean on the single-tag, single-harvest pattern from 2023–2025 as the more reliable baseline for what an actual desert bighorn draw looks like in 13A.
Trophy potential is where this unit separates itself. The counties overlapping Unit 13A carry a strong history of producing trophy-class rams, and that pedigree is shared with neighboring units drawing from the same county-level records. Hunters should understand that record-book entries are logged by county rather than unit boundary, so the trophy history associated with 13A reflects a broader regional reputation for quality rams rather than an exact unit-only tally. Still, a strong trophy history at the county level is a meaningful signal — this is desert sheep country capable of producing genuinely exceptional rams, not just opportunity tags.
The bottom line: if a hunter is fortunate enough to draw Unit 13A for desert bighorn sheep, the data supports high confidence in both filling the tag and having a shot at a quality ram. This is a unit worth listing high on any serious sheep application strategy.
Herd Health & Population Trends
Survey data from 2023 shows an average buck:doe — in this context, ram:ewe — ratio of 58:100, based on one survey year with 65 animals observed. A ratio at that level, while on the higher side for wild sheep populations, comes from a single survey year and a relatively modest sample size of animals observed. Hunters should treat this as a snapshot rather than an established multi-year trend, since Arizona Game and Fish's desert bighorn surveys in remote, rugged units like 13A are inherently limited by the difficulty of counting sheep across such vast, broken terrain.
What can be said with more confidence is that a population supporting 65 observed animals in a single survey, combined with a consistent one-tag, one-harvest pattern in recent years, points to a herd that is being managed conservatively. Arizona Game and Fish sets desert bighorn quotas deliberately low to protect breeding-age rams and herd stability, and the harvest data here is consistent with that conservative management philosophy rather than signaling an unusually abundant or thin herd.
Trophy Quality
Desert bighorn sheep from the counties overlapping Unit 13A carry a strong trophy history, with this region contributing meaningfully to Arizona's reputation as one of the premier desert sheep destinations in the country. Because record-book entries are attributed at the county level rather than to a specific hunt unit, the trophy pedigree associated with 13A is shared with adjacent units drawing from the same overlapping counties — a ram entered in the record books from this region could have been taken anywhere within that broader county footprint.
That caveat aside, a strong trophy history at the county level is a meaningful data point for any hunter fortunate enough to draw this tag. It suggests the genetics, forage, and habitat conditions in this corner of Arizona have consistently supported mature rams capable of reaching trophy-class dimensions. Combined with the unit's extreme elevation range — over 6,300 feet of vertical relief from the Colorado River bottoms to the highest peaks — 13A offers the kind of rugged, undisturbed terrain where old rams can live out their full life cycle away from heavy hunting pressure, since so few tags are issued each year.
Hunters drawing this tag should expect to invest real time in glassing and patience rather than expecting a quick harvest, but the underlying trophy potential here is real and well-documented at the regional level.
Access & Terrain
Unit 13A is defined by dramatic topography. Elevations range from 1,614 feet up to 7,995 feet, meaning hunters could be working desert lowlands near the Colorado River corridor one day and climbing into higher rocky peaks the next. This kind of vertical diversity is exactly the terrain type desert bighorn sheep favor — steep, broken, rocky country with limited vegetation cover, allowing sheep to use elevation and sightlines as their primary defense against predators.
With 95% of the unit's 1,241,702 acres in public ownership, access is about as good as it gets in the West. There is no meaningful private land bottleneck here, and hunters won't need to negotiate landowner permissions to reach the vast majority of huntable terrain. This is one of the more DIY-accessible sheep units in Arizona in terms of raw access — the challenge isn't getting onto public ground, it's covering the physical distance and vertical relief once there.
The unit also carries 0% wilderness designation, meaning there are no additional wilderness-area travel restrictions to navigate — no mandatory foot/stock-only access zones layered on top of the already demanding terrain. That said, don't mistake "no wilderness" for "easy." The elevation swing alone — over a mile of vertical relief across the unit — means hunters need to be prepared for extended, physically demanding scouting and pack-out logistics regardless of wilderness status. Hunters planning to scout this unit should lean on HuntPilot's public land and terrain-overlay map tools to identify likely glassing points and drainage systems before committing boots on the ground, since the sheer size of the unit makes blind scouting inefficient.
How to Apply
Every bighorn sheep hunt in Arizona, including all hunts in Unit 13A, is issued through the state's limited-quota draw system. There is no over-the-counter or general season option for this species anywhere in Arizona — hunters must apply and be drawn to hunt desert bighorn sheep in this unit or any other.
Arizona's big game draw operates on a bonus point system, with separate resident and nonresident applicant pools. Bonus points improve a hunter's statistical odds in the random draw but do not guarantee a tag at any point level — Arizona uses a weighted random draw structure rather than a strict preference system, meaning even hunters with high point totals face genuine uncertainty each year. This is especially true for desert bighorn sheep, which remains one of the most competitive draws in the entire western United States regardless of species or state. Long-time applicants in the sheep-hunting community routinely describe needing a decade or more of accumulated points before drawing a tag in any unit, and that reality holds true for 13A as much as any other Arizona sheep unit.
Residents and nonresidents both apply through the same draw structure, though nonresidents are subject to separate quota allocations and generally face steeper odds than residents applying for the same units. Because Arizona's draw system, quotas, and application windows are updated annually, hunters should not rely on outdated fee or deadline information from any source. For current application deadlines, fees, and draw odds specific to Unit 13A, visit HuntPilot's Arizona state page at /states/az, where draw data is kept current for each application cycle.
Frequently Asked Questions
What is the terrain like in Arizona Unit 13A? Unit 13A features extreme elevation variation, ranging from 1,614 feet near the lower desert terrain to 7,995 feet at its highest points — more than 6,300 feet of vertical relief within a single unit. This creates classic desert bighorn sheep habitat: steep, rocky, broken country with sparse vegetation that gives sheep the visibility and escape terrain they rely on. With 95% public land across the unit's 1,241,702 acres, access to this terrain is not a limiting factor, though the scale and ruggedness of the ground itself is a significant physical challenge for scouting and hunting.
What is harvest success like in Unit 13A for bighorn sheep? Recent years show extremely limited but highly successful hunts. In 2025, 2024, and 2023, the unit recorded exactly one hunter and one harvest each season — 100% success in all three years. This reflects the nature of Arizona's desert bighorn sheep management: very few tags issued, typically to well-prepared hunters who have scouted extensively, resulting in consistently high fill rates. A 2022 figure showing 18 hunters and 200 harvested animals appears to reflect aggregated data beyond a single-species bighorn hunt and should not be used as a representative baseline.
How big are the bighorn sheep in Unit 13A? The counties overlapping Unit 13A carry a strong history of producing trophy-class desert bighorn rams, according to record-book data. Because these records are logged at the county level rather than by exact unit, that trophy pedigree is shared with neighboring units drawing from the same overlapping counties. Still, this regional trophy history is a strong indicator that the habitat and herd genetics in this part of Arizona are capable of producing exceptional, mature rams for hunters who draw a tag here.
Is Unit 13A worth applying for as a desert bighorn sheep hunter? Yes — for hunters serious about pursuing desert bighorn sheep, Unit 13A merits a place near the top of any Arizona application list. The unit combines a strong regional trophy history, a consistent recent record of 100% harvest success for the hunters who draw it, and outstanding public access at 95% of its 1,241,702 acres. The primary obstacle isn't the unit itself — it's simply drawing the tag, which for desert bighorn sheep anywhere in Arizona requires significant point accumulation and patience regardless of unit choice.
How many bighorn sheep tags are issued for Unit 13A each year? Recent harvest data shows only a single hunter afield in 2025, 2024, and 2023, indicating an extremely low annual quota consistent with Arizona's conservative desert bighorn sheep management approach statewide. Because tag quotas can shift from year to year based on herd survey results, hunters should check HuntPilot's Arizona unit page for the most current quota information before applying.