Arizona Unit 45A Bighorn Sheep Hunting Guide

Arizona Unit 45A sits along the Colorado River corridor, spanning 205,709 acres of low-desert terrain ranging from 1,186 to 4,835 feet in elevation. For hunters chasing bighorn sheep in the desert Southwest, this unit represents one of the more storied pieces of ground in Arizona's sheep-hunting portfolio. With 100% of the unit classified as public land and zero wilderness acreage restricting motorized access, Unit 45A offers a rare combination: full public access to a genuine trophy sheep unit.

This is not a unit hunters draw casually or often. Bighorn sheep tags in Arizona are among the most difficult permits to secure in North American big game hunting, and Unit 45A is no exception. But for those who do draw — whether after years of point accumulation as a nonresident or through Arizona's bonus point system as a resident — this unit has the terrain, the herd health, and the trophy pedigree to justify the wait. This article breaks down what the data actually shows about Unit 45A, so hunters can decide whether it belongs on their long-term application strategy.

HuntPilot Analysis: Is Unit 45A Worth Applying For?

Based on the data compiled by HuntPilot, Unit 45A earns its reputation as a premier desert bighorn destination. The unit's 100% public land status is the single most important access data point here — hunters who draw this tag will not be fighting for landowner permission or dealing with a patchwork of private inholdings. Every acre of the 205,709-acre unit is open to the tag holder, which is unusual and valuable in Arizona's checkerboarded desert landscape.

The trophy history tells a compelling story as well. The counties overlapping Unit 45A carry an extensive history of trophy-class bighorn entries, indicating this stretch of desert has consistently produced rams that rank among the best in the region across multiple decades. That kind of sustained trophy production is not something every sheep unit can claim, and it should factor heavily into any hunter's decision to prioritize this unit in their application strategy.

Herd health data reinforces the picture. The 2024 survey recorded 351 animals observed, a solid sample size that speaks to a healthy, huntable population base along the river corridor. The buck:doe ratio of 53:100 reported in that survey should be read with some caution, since it reflects a single survey year — hunters should treat it as one data point rather than a definitive trend, and watch for updated survey data in future years to confirm whether that ratio holds.

Where the data gets more complicated is harvest. The unit's recent harvest figures show extreme swings: 11 hunters and 10 harvested in 2025 (91% success), 8 hunters and 8 harvested in both 2024 and 2023 (100% success each year), and then a dramatic outlier in 2022 with 46 hunters and 200 harvested animals, producing a 435% success figure. That 2022 number is almost certainly the product of aggregated hunt types or a reporting anomaly in the unit-total harvest data rather than a literal reflection of one-tag-per-hunter bighorn hunting, and hunters should not read it as representative of typical outcomes. The more reliable signal is the 2023-2025 window, where small numbers of hunters posted consistent, very high success rates — a hallmark of how limited-entry bighorn hunts function in Arizona. When a hunter finally draws one of these tags, they are hunting with elite odds of connecting, because the state issues so few permits and pairs them with intensive pre-season scouting support.

The verdict: Unit 45A is absolutely worth applying for if a hunter is playing the long game for bighorn sheep. It combines full public access, strong trophy pedigree, and a demonstrated pattern of hunters converting tags into harvests. The challenge isn't the hunt itself — it's getting drawn in the first place.

Herd Health & Population Trends

The most recent wildlife survey, conducted in 2024, counted an average of 351 animals per survey across the unit — a healthy number for a desert bighorn population operating in this kind of low-elevation, arid terrain. The buck:doe ratio recorded was 53:100, based on a single survey year. Because this figure comes from only one year of data, hunters should treat it as a snapshot rather than an established trend line. A ratio in this range is not unusual for bighorn populations, but without multiple years of comparative data, it's difficult to say definitively whether the herd is trending up, down, or holding steady. Hunters drawing this tag in the near term should look for updated Arizona Game and Fish survey releases closer to their hunt date to confirm current population dynamics.

Trophy Quality

Unit 45A benefits from being surrounded by counties with an extensive history of trophy record-book entries for desert bighorn sheep. This is significant: sustained trophy production across decades, rather than a single lucky year, signals a population structure capable of growing mature, full-curl rams — the kind of animal that defines a once-in-a-lifetime bighorn hunt. Hunters should keep in mind that trophy records are logged at the county level and are shared among all units overlapping those counties, so this trophy pedigree reflects the broader region rather than being exclusive to 45A's boundaries. Still, drawing a tag in this unit puts a hunter squarely within a geographic pocket that has consistently produced exceptional rams, which is about as strong an indicator as exists for prioritizing a unit in a long-term application strategy.

Harvest Success Rates

Looking at the last four reporting years, Unit 45A has delivered outstanding success rates for the hunters who drew tags:

• 2025: 11 hunters, 10 harvested — 91% success
• 2024: 8 hunters, 8 harvested — 100% success
• 2023: 8 hunters, 8 harvested — 100% success
• 2022: 46 hunters, 200 harvested — 435% success (unit total, likely reflecting aggregated hunt data rather than standard one-tag success)

Setting aside the 2022 anomaly, the pattern across 2023-2025 is remarkably consistent: small hunter numbers (8 to 11 per year) posting success rates at or near 100%. This is typical of how Arizona manages its premium bighorn units — few tags issued, but hunters who draw them are supported by strong herd densities and open terrain that favors spotting and stalking mature rams. A hunter who draws Unit 45A should enter the season with real confidence that, historically, the overwhelming majority of tag holders here go home successful.

Access & Terrain

Unit 45A spans an elevation range of 1,186 to 4,835 feet, characteristic of low desert country along the Colorado River drainage. This is classic desert bighorn habitat: rugged, broken volcanic and sedimentary terrain, steep canyon walls, and rocky escarpments that sheep use for security cover, interspersed with washes and benches that hold sparse desert vegetation.

The standout access statistic here is the unit's 100% public land designation. There is no private land to navigate, no landowner permission to secure, and no wilderness acreage (0%) restricting vehicle or mechanized access into the unit. That combination — full public ownership with no wilderness overlay — makes Unit 45A one of the more logistically straightforward bighorn units in Arizona to scout and hunt, even though the terrain itself remains physically demanding. Hunters should still expect steep, technical ground typical of desert sheep country; low elevation numbers don't mean easy walking, they mean heat, rock, and vertical relief packed into a smaller elevation band. Hunters planning to scout this unit should use HuntPilot's public land and terrain overlays to identify glassing points, drainage systems, and access routes before committing to a boots-on-the-ground trip.

How to Apply

Note that both resident and nonresident applicants must hold a qualifying license before applying — this license fee is separate from and in addition to the application fee and point fee. Nonresidents should budget for the full cost stack: license fee, application fee, and point fee up front, with the substantial tag fee due only if drawn.

For current draw odds specific to Unit 45A and other Arizona sheep units, visit HuntPilot's Arizona state page at /states/az, where application data is tracked and updated as new draw cycles are announced.

Application dates and fees change every draw cycle. For the current deadlines, fees, and draw odds, see HuntPilot's Arizona page at /states/az.

Frequently Asked Questions

What is the terrain like in Unit 45A? Unit 45A features low desert terrain along the Colorado River corridor, ranging from 1,186 to 4,835 feet in elevation. Expect rugged, rocky canyon and escarpment country typical of desert bighorn habitat — broken volcanic outcrops, steep-sided washes, and open benches that sheep use for both feeding and security cover. The entire unit is public land with no wilderness designation, meaning motorized access is more available than in wilderness-restricted sheep units, though the terrain itself remains physically demanding.

What is harvest success like in Unit 45A? Harvest success has been very high in recent years. In 2023 and 2024, all 8 hunters who held tags each year successfully harvested a ram, for 100% success both seasons. In 2025, 10 of 11 hunters were successful, a 91% rate. These figures reflect the typical pattern for Arizona's premium, low-quota bighorn units, where herd density and terrain openness favor successful stalks once a tag is drawn.

How big are the bighorn sheep in Unit 45A? The counties overlapping Unit 45A have an extensive history of trophy-class bighorn ram entries, indicating this region has consistently produced some of the better rams in the state across multiple decades. While specific scores aren't published here, the sustained trophy record from this area places it among Arizona's stronger bighorn units for trophy potential.

Is Unit 45A worth applying for? Yes, based on the available data. The unit combines 100% public land access, a strong multi-decade trophy history in the surrounding counties, a healthy population (351 animals observed in the 2024 survey), and consistently high harvest success rates for hunters who draw tags. The primary obstacle is the draw itself, which is extremely competitive for bighorn sheep statewide — hunters should check current draw odds on HuntPilot's Arizona unit pages and plan for a long-term point strategy.

What does it cost to apply for a bighorn sheep tag in Unit 45A?

Fees and deadlines change every draw cycle, so the current figures live on HuntPilot's Arizona page at /states/az rather than here.