Arizona Mule Deer Coues Whitetail Deer

Unit 36C (Altar Valley and the Buenos Aires refuge)

Arizona Hunting Guide — Mule Deer, Coues Whitetail Deer

GMU 36C is the Altar Valley south of Three Points — the ranch and refuge country between Highway 86 and the Mexican border, bounded west by the Tohono O'odham Nation and east by Highway 286. Most of the unit is State Trust land and ranch ground opened to hunting through stewardship agreements, with the Buenos Aires National Wildlife Refuge taking in a large block of it. AZGFD's unit guide for 36C is unusual: it carries no per-species sections at all, and is instead almost entirely about access — mandatory sign-in stations, a milepost list of ranch entrances, closures and foot-only country. Both mule deer and Coues whitetail live here, and the unit guide warns that wrong-species kills have increased.

View Draw Odds Arizona Hunting Guide

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Public Land

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2,545–5,570 ft

Sampled elevation

Build your own PDF hunt guide for Unit 36C

Answer a few questions about your tag, your season and your rig, and the Field Intelligence Report builds a print-ready Arizona Unit 36C guide around your hunt: three ranked spots with morning, afternoon and evening plays, a day-by-day plan, topo maps with every pin numbered, a camp and access plan, the legal and retrieval rules for this unit, shot discipline, a meat-care and pack-out plan, and a pre-trip checklist. Every coordinate sits on land recorded as public.

Mule Deer guide Coues Whitetail Deer guide

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Logistics & Planning Guide →

Access roads, campgrounds, elevation, monthly weather, stock tanks, cell coverage, and nearest-town services for Unit 36C.

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Mule Deer Hunting in Unit 36C

Where to hunt in 36C: the ranches off Highway 286, by milepost

An honest note first. AZGFD's 36C unit guide has no per-species area sections — no "Mule Deer: Areas" block to work from. What it has instead is the most detailed access write-up of any Arizona unit guide, because in 36C access is the hunting information. We're not going to invent drainages the agency didn't name.

Access is off Highway 286, and it is signed by milepost

The agency lists the entrances south of Three Points by milepost: King's Anvil Ranch at 37.7, Elkhorn Ranch at 25.2, Las Delicias Ranch at 23.2, Brown Canyon at 20.5, Thomas Canyon at 15.7, Santa Margarita Ranch at 14.3, the Arivaca–Sasabe Road at 12, Los Encinos Ranch at 9.4, Buenos Aires headquarters and the Aros Ranch at 7.7, and the Pozo Verde Mountains at 4.2. That list is your map of the unit.

The sign-in rule, which is not optional

There are several mandatory sign-in stations through the unit, and each one is independent — signing in at one ranch gives you nothing at the next. Failing to sign in will result in trespassing charges. Fill the sheet out completely, sign out when you leave, and leave the ranch passes on the ranch.

What is closed

All private land on the Santa Margarita Ranch is closed to every use — no trespassing, hunting, fishing, camping or trapping. OHVs are prohibited on the King's Anvil Ranch, which also doesn't open until 1 September. In Brown Canyon, not all of it is open: the Buenos Aires refuge has designated no-hunt zones at the mouth of the canyon and along the canyon bottom, and hunters must park at the designated lot and hike to State Trust and BLM land.

Foot-only country, and State Trust land

Much of 36C is accessible by foot only, and those areas are signed. Most of the unit is State Trust land, which needs a valid hunting or fishing licence or a State Land permit just to enter. Portions of the Buenos Aires refuge inside 36C are open to javelina and deer hunting, with camping only in designated sites — call the refuge on 520-823-4251.

The terrain you'll be hunting

Inside the unit, the Coyote Mountains reach 6,515 feet with Mildred Peak at 5,400, Saucito Mountain at 5,011, Lalo Peak at 4,941, Aguirre Peak at 4,914, Caponera Peak at 4,883 and Presumido Peak at 4,786. Below them: North Pass at 4,613 feet, Deadman Pass at 4,347, Leyvas Canyon at 4,267, Weaver Canyon at 4,209, Jupiter Canyon at 4,183, Nogales Canyon at 4,053, Thomas Canyon at 3,968 and Presumido Pass at 3,934. Mule deer use the open grassland, the bajadas and the lower hills; whitetail hold the rough slopes above.

Unit 36C terrain and land status

Measured from the unit boundary, not from the agency write-up

The lay of it

2,545–5,570 ft on a terrain sample , averaging 3,738 ft ; peaks can run higher.
318.4 sq mi inside the boundary.

Who owns the ground

BLM — 15%
State Trust — 8%
Private / Other — 77%

Roughly 23% is public. Carry a land-status layer anyway — these are area percentages, not a map of where the boundaries fall.

Water on the ground

251 tanks
12 springs
148 stream segments

Counts from mapping data, so this is how many exist, not how many hold water in a dry year. Sitting water only pays where you find fresh tracks.

Named features inside the unit

Glass from: Coyote Mountains (6,515 ft), Mildred Peak (5,400 ft), Saucito Mountain (5,011 ft), Lalo Peak (4,941 ft)

Holding ground: North Pass (4,613 ft), Nogales Canyon (4,053 ft), Thomas Canyon (3,968 ft), Broken Trough Spring, San Rafael Well

Every one of these was tested against the unit polygon before it went on the map. They are starting points, not agency recommendations.

How to hunt 36C: sort the access first, then glass the hills over the Altar Valley

Rifle success for mule deer in this part of the state runs about 22 percent. On 36C the planning problem is bigger than the hunting problem, so take them in that order.

Do the paperwork before you drive

Buy the licence that covers State Trust entry. Note which ranch entrance you're using and what milepost it's at. Plan to sign in at every box you pass and sign out when you leave. Call the Buenos Aires refuge for the current no-hunt zone map if your plan touches it. None of this is bureaucracy for its own sake — this unit is huntable only because of stewardship agreements, and the agency lists littering, driving off-road, camping within a quarter mile of water and parking near corrals among the problems that threaten them.

Then hunt the way the country allows

Much of 36C is foot-only, which rules out covering ground by vehicle and rules in the thing that works in big open valley country — get on one of the hills, put the glass on a tripod, and work the grassland and bajada below it through first and last light. Mule deer will be in the open and the lower hills. Whitetail will be on the steeper, rougher slopes above, and those take the long patient glassing the grey ghost always takes.

Brown Canyon, done properly

Park at the designated lot, hike to the State Trust and BLM ground above the refuge's no-hunt zones, and hunt from there. The walk is the filter — it's also what makes that country worth hunting.

Know which deer you're looking at

The unit guide carries a specific warning: 36C has both whitetail and mule deer, and there has been an increase in the wrong species being shot in recent years. Study the differences before the season. Ears, tail, antler branching — and if you can't see enough of the animal, don't shoot.

Border country

This unit runs to the international border and the refuge sits on it. Hunt with a partner, tell someone your plan and your vehicle details, and read the special note on border issues at the end of the unit report.

Getting in and staying out: unit 36C

Named routes and what they need

AZ 286 — 12.7 mi · Paved (all rigs)
South Coleman Road — 1.5 mi · Graded gravel (2WD / small trailer)
West Ressie Road — 1.3 mi · Graded gravel (2WD / small trailer)
270 — 1.2 mi · Graded gravel (2WD / small trailer)
South Hayhook Ranch Road — 1.2 mi · Graded gravel (2WD / small trailer)
208 — 1 mi · Graded gravel (2WD / small trailer)

Ratings come from road data, not from a drive this season. Check current conditions with the managing office before you commit a trailer.

Nearest services

Haivana Nakya — 18.1 mi · no services listed
Topawa / Ḍo Bawui — 18.4 mi · no services listed
San Miguel — 20.3 mi · no services listed
Sasabe — 21.7 mi · fuel, groceries, lodging
El Sásabe — 22.7 mi · fuel, groceries, lodging

Developed camps

Season weather and signal

Jan55° / 34° · 1.4" precip
Aug84° / 62° · 4" precip
Sep81° / 59° · 2.2" precip
Oct73° / 50° · 0.8" precip
Nov63° / 41° · 0.7" precip
Dec55° / 34° · 1.7" precip

Best signal is Verizon at about 26% of the unit. Plan on being out of contact and tell someone your route.

Arizona rules that decide your day

Summarised from AZGFD regulations. They change — read the current regulations and your permit-tag before you hunt.

Legal shooting hours

Big game may be taken only during daylight hours — from sunrise to sunset. Check the sunrise and sunset times for your unit, not for Phoenix.

Motorized retrieval

Arizona permits motorized big-game retrieval only where the unit's travel-management decision allows it, and in several units only for elk. Where it is allowed it means one vehicle, one trip, within one mile of a road shown open on the Motor Vehicle Use Map — never inside a quiet area, a wilderness or a closed area. Pull the MVUM for your ranger district and confirm before you shoot somewhere you cannot carry an animal out of.

Tagging

Sign your tag before you go afield and attach it to the animal immediately after the kill. Hunters aged 10–13 must carry their Hunter Education card with the licence and tag.

Leaving meat

Leaving edible meat in the field is illegal. Edible meat means the four quarters and the loins at a minimum.

Where you may not shoot

Occupied structures — No shooting within a quarter mile of an occupied farmhouse, cabin, lodge or building without the owner's permission. That rules out shooting toward most lakeside cabin tracts.
Campsites and developed areas — Forest Service rules prohibit discharging a firearm within 150 yards of a residence, building, campsite, developed recreation site or occupied area.
Roads and water — No shooting from a vehicle, and no shooting on, across or into a road. No shooting across a body of water adjacent to a Forest road.

Mule Deer: where to put the shot

Broadside or quartering away, on the back edge of the front leg about a third of the way up the body.

Shots to refuse

Nothing behind or overlapping the animal you picked.
Your maximum range is the farthest you have shot a three-shot group into a paper plate from the rest you are carrying.
Pass the shot you are talking yourself into.

Plan the carry: roughly 40– 120 lb of boned-out meat, before head and hide — two large coolers. ProHunt planning estimate, not an agency figure.

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Mule Deer Success Rates

Rifle22%

Unit 36C mule deer success typically runs 20–35% for rifle hunters. Bucks are average-to-good quality with occasional heavy-antlered mature deer from the Atascosa core. Low hunter density on weekdays improves the hunt.

Mule Deer Draw Odds

Season	Tags	Applicants	Draw %	Pts (n/p)
Rifle — Late Rifle Nov bull/buck only (combined pool)	50	86	30.2%	—
Rifle — Late Rifle Nov bull/buck only (combined pool)	25	67	23.9%	—
Rifle — General Rifle Oct bull/buck only (combined pool)	50	103	47.6%	—
Rifle — General Rifle Oct either sex (combined pool)	50	103	47.6%	—
Rifle — Late Rifle Nov either sex (combined pool)	50	86	30.2%	—
Rifle — Late Rifle Nov either sex (combined pool)	25	67	23.9%	—

Data from 2025 draw results. Each row is one residency pool — read the label before the number. This agency publishes no point thresholds, so the Pts column stays blank and these are pool odds, not what a point total draws.

Open in Draw Odds Engine

Unit 36C mule deer is a mid-odds draw. Arizona uses a weighted bonus-point system with Hunter Education bonus — 20% of tags go to max-point holders first, 80% flow through a random weighted draw. With ~150 tags against 236 applicants over three years, residents commonly draw with 1–3 bonus points. Nonresidents face the 10% cap.

Coues Whitetail Deer Hunting in Unit 36C

Unit 36C covers the rolling grassland and sky island foothills of extreme southern Santa Cruz County along the Mexican border, drawing over 2,700 cumulative Coues whitetail applicants. The unit's remote location and limited road network allow bucks to mature in relative undisturbed conditions — the borderlands terrain produces quality Coues deer in a setting where hunter access requires genuine effort.

Where the Coues deer are in 36C: the rough slopes above the Altar Valley grass

Same honest note as the mule deer page: AZGFD's 36C unit guide carries no per-species area sections. It lists the species present — javelina, mule deer, white-tailed deer, cottontail, dove and quail — and then spends its pages on access, because that's what decides a hunt here. So what follows is built from the unit's terrain, its access rules and how Coues deer use this kind of country, not from an agency area list that doesn't exist.

The ranges, which is where whitetail will be

Coues deer want rough, steep ground with cover. In 36C that means the mountains standing out of the Altar Valley rather than the valley itself. The Coyote Mountains top the unit at 6,515 feet. Mildred Peak sits at 5,400, Saucito Mountain at 5,011, Lalo Peak at 4,941, Aguirre Peak at 4,914, Caponera Peak at 4,883, Three Peaks at 4,868 and Presumido Peak at 4,786. The Pozo Verde Mountains come in off Highway 286 at milepost 4.2, at the unit's southern end.

The canyons to glass into

Leyvas Canyon at 4,267 feet, Weaver Canyon at 4,209, Jupiter Canyon at 4,183, Nogales Canyon at 4,053 and Thomas Canyon at 3,968, with North Pass at 4,613, Deadman Pass at 4,347 and Presumido Pass at 3,934 as the saddles between. Deer cross at saddles and bed in the heads of canyons; those two facts give you your glassing positions.

Brown Canyon, with the refuge rules

Brown Canyon comes in at milepost 20.5 and is good-looking country, but not all of it is open: the Buenos Aires refuge keeps no-hunt zones at the mouth and along the canyon bottom. Park at the designated lot and hike up to State Trust and BLM land. That walk keeps the pressure down.

Which entrances get you to the hills

From the agency's milepost list, the entrances that put you nearest the rough country are King's Anvil Ranch at 37.7, Elkhorn at 25.2, Thomas Canyon at 15.7, Los Encinos at 9.4 and the Pozo Verde Mountains at 4.2. Sign in at every box. Signing in at one ranch does not cover the next.

Water

About 251 tanks and 12 springs across 318 square miles. In a dry winter the tanks that hold water concentrate deer movement, and they're the one piece of this unit you can scout quickly from a vehicle on the open ground.

Unit 36C terrain and land status

Measured from the unit boundary, not from the agency write-up

The lay of it

2,545–5,570 ft on a terrain sample , averaging 3,738 ft ; peaks can run higher.
318.4 sq mi inside the boundary.

Who owns the ground

BLM — 15%
State Trust — 8%
Private / Other — 77%

Roughly 23% is public. Carry a land-status layer anyway — these are area percentages, not a map of where the boundaries fall.

Water on the ground

251 tanks
12 springs
148 stream segments

Counts from mapping data, so this is how many exist, not how many hold water in a dry year. Sitting water only pays where you find fresh tracks.

Named features inside the unit

Glass from: Coyote Mountains (6,515 ft), Mildred Peak (5,400 ft), Saucito Mountain (5,011 ft), Lalo Peak (4,941 ft)

Holding ground: North Pass (4,613 ft), Nogales Canyon (4,053 ft), Thomas Canyon (3,968 ft), Broken Trough Spring, San Rafael Well

Every one of these was tested against the unit polygon before it went on the map. They are starting points, not agency recommendations.

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How to hunt 36C Coues deer: walk in off a signed entrance and glass until you find one

Rifle success for whitetail in this country runs about 18 percent. With no agency area list for 36C, the hunters who do well here are the ones who solve access cleanly and then glass properly.

Access first, in this order

Pick your entrance off the milepost list. Carry the licence that covers State Trust entry. Sign in at every station you pass, completely, and sign out when you leave — failing to sign in is trespass, not a technicality. Leave ranch passes on the ranch. Keep every wheel on an existing road, camp more than a quarter mile from water, and don't park near corrals during ranch operations.

Then walk, because much of it is foot-only

Signed foot-only country is a gift to a Coues hunter. Get in before light, climb to a position that looks into a canyon head or across a saddle, and settle in with the glass on a tripod. Work the slope in sections. Expect to spend hours on one face.

Slope and time of day

Sunlit faces early while deer feed in the cool, shaded and brushier north faces as the day warms and they bed. In small ranges like the Pozo Verdes you can watch both from one spot, which is worth more than covering ground.

Don't blow the stalk

A Coues buck that's seen you leaves the country. So pick the route from the glassing point, use the wind, and accept losing sight of him for most of the approach. If he stands and stares without identifying you, stop moving entirely.

Identification, and the border

Mule deer share 36C and the guide warns that wrong-species kills have increased here. Whitetail are smaller and greyer with a broad flagging tail. Confirm it before you shoot. And read the unit report's border-issues note — hunt with a partner and leave your plan with someone.

Getting in and staying out: unit 36C

Named routes and what they need

AZ 286 — 12.7 mi · Paved (all rigs)
South Coleman Road — 1.5 mi · Graded gravel (2WD / small trailer)
West Ressie Road — 1.3 mi · Graded gravel (2WD / small trailer)
270 — 1.2 mi · Graded gravel (2WD / small trailer)
South Hayhook Ranch Road — 1.2 mi · Graded gravel (2WD / small trailer)
208 — 1 mi · Graded gravel (2WD / small trailer)

Ratings come from road data, not from a drive this season. Check current conditions with the managing office before you commit a trailer.

Nearest services

Haivana Nakya — 18.1 mi · no services listed
Topawa / Ḍo Bawui — 18.4 mi · no services listed
San Miguel — 20.3 mi · no services listed
Sasabe — 21.7 mi · fuel, groceries, lodging
El Sásabe — 22.7 mi · fuel, groceries, lodging

Developed camps

Season weather and signal

Jan55° / 34° · 1.4" precip
Aug84° / 62° · 4" precip
Sep81° / 59° · 2.2" precip
Oct73° / 50° · 0.8" precip
Nov63° / 41° · 0.7" precip
Dec55° / 34° · 1.7" precip

Best signal is Verizon at about 26% of the unit. Plan on being out of contact and tell someone your route.

Arizona rules that decide your day

Summarised from AZGFD regulations. They change — read the current regulations and your permit-tag before you hunt.

Legal shooting hours

Big game may be taken only during daylight hours — from sunrise to sunset. Check the sunrise and sunset times for your unit, not for Phoenix.

Motorized retrieval

Tagging

Sign your tag before you go afield and attach it to the animal immediately after the kill. Hunters aged 10–13 must carry their Hunter Education card with the licence and tag.

Leaving meat

Leaving edible meat in the field is illegal. Edible meat means the four quarters and the loins at a minimum.

Where you may not shoot

Occupied structures — No shooting within a quarter mile of an occupied farmhouse, cabin, lodge or building without the owner's permission. That rules out shooting toward most lakeside cabin tracts.
Campsites and developed areas — Forest Service rules prohibit discharging a firearm within 150 yards of a residence, building, campsite, developed recreation site or occupied area.
Roads and water — No shooting from a vehicle, and no shooting on, across or into a road. No shooting across a body of water adjacent to a Forest road.

Coues Whitetail Deer: where to put the shot

Broadside or quartering away, on the back edge of the front leg about a third of the way up the body.

Shots to refuse

Nothing behind or overlapping the animal you picked.
Your maximum range is the farthest you have shot a three-shot group into a paper plate from the rest you are carrying.
Pass the shot you are talking yourself into.

Plan the carry: roughly 40– 120 lb of boned-out meat, before head and hide — two large coolers. ProHunt planning estimate, not an agency figure.

Pro Members Only

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Coues Whitetail Deer Success Rates

Success rate data not yet available for this species in this unit.

Unit 36C rifle Coues success typically runs 40–60%. Remote location reduces pressure and allows mature bucks to develop in the unit core.

Coues Whitetail Deer Draw Odds

Season	Tags	Applicants	Draw %	Pts (n/p)
Rifle — General Rifle Oct bull/buck only (combined pool)	175	233	56.7%	—
Rifle — Late Rifle Nov bull/buck only (combined pool)	175	147	51.0%	—
Rifle — Late Rifle Dec bull/buck only (combined pool)	125	603	17.9%	—

Open in Draw Odds Engine

Over 2,700 cumulative applicants. Expect 6–11 bonus points for Unit 36C Coues rifle tags.

Unit Logistics & Expectations

Planning Notes

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Trailer Access

I-19 and SR-289 (Ruby Road lower) paved. Upper Ruby Road and forest spurs are high-clearance gravel, rough in spots.

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Water

Peña Blanca Lake (year-round). Ruby townsite seasonal well. Nogales for full fill.

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Road Conditions

Paved to Peña Blanca. Ruby Road and backcountry spurs graded gravel to rough 4WD. Wet conditions produce deep mud.

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Terrain Difficulty

Moderate. Rolling sky-island country with rocky footing. Fitness important for stalks.

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Hunting Pressure

Low to moderate. Weekday pressure is light; weekends see more hunters from Tucson and Nogales.

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Weather

Early hunts: 65–85°F days, 40–55°F nights. Late hunts: 50–70°F days, 30–45°F nights.

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Cell Service

Verizon along I-19 and near Nogales. Patchy to none in Atascosa interior.

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Nearest Town

Nogales (full services, hospital). Tubac (basic). Amado and Arivaca (very limited).

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Permit Notes

AZGFD tag required. Border-area hunt — Border Patrol presence common; carry ID; stay on marked roads; report suspicious activity rather than engage.

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Frequently Asked Questions

Is Unit 36C safe given the border proximity?

Border Patrol maintains heavy presence in 36C and most hunters hunt without incident. Stay on main roads and marked trails, tell someone your hunt plan, carry ID, and avoid the immediate border corridor at night. Report suspicious activity — don't engage.

Can I hunt both mule deer and Coues whitetail in 36C?

Your tag is species-specific. Unit 36C holds both, and you'll often glass both species from the same vantage, but harvest only the species on your tag.

Where's the best base camp for Unit 36C?

Peña Blanca Lake Campground is a classic base with water and access to Ruby Road. Dispersed camping along upper Ruby Road is also popular for hunters willing to drive rougher roads.

Is the remote borderlands location of Unit 36C a safety concern?

Unit 36C is in a remote border area. Hunt with a partner, carry a satellite communicator, inform someone of your itinerary, and verify current conditions with USBP and local land managers before entry. The AZGFD open land is legally huntable — standard remote safety practices apply.

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Sources & Verification

Every fact on this page is tied to a primary source below. Last fact-checked 2026-04-18.

AZGFD Game Management Units — Arizona Game and Fish Department · supports: Unit 36C Atascosa / Tumacacori highlands boundaries, Sky-island oak-grassland habitat, Mule deer and Coues whitetail overlap, Season structure · accessed 2026-04-17
AZGFD Draw Portal — Arizona Game and Fish Department · supports: Unit 36C mule deer draw odds, Weighted bonus point system, Historical odds · accessed 2026-04-17
Coronado National Forest — Nogales Ranger District — USDA Forest Service · supports: Atascosa / Tumacacori road network, Ruby Road access, Border-area travel considerations · accessed 2026-04-17
AZGFD Big Game Draw — Arizona Game and Fish Department · supports: Applicant counts, Draw odds · accessed 2026-04-18