Buenos Aires National Wildlife Refuge (E, 9mi), Pima
Wildlife Areas in Arizona
Photo: Evan Blaser from San Francisco, US and A / CC BY 2.0
Near Arivaca, AZ in Arizona
What to Pack for Buenos Aires National Wildlife Refuge (E, 9mi), Pima
Pack with the terrain and wildlife in mind, and you'll be ready for anything here.
A well-prepared pack for Buenos Aires National Wildlife Refuge covers 2 categories: essential, terrain gear.
Essential
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Water (minimum 2L) — Even cool-weather hiking demands steady hydration, as exertion and altitude increase water loss faster than most expect.
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Navigation (map/GPS/compass) — Even well-marked trails have confusing junctions, especially in fog or snow; a GPS unit or downloaded map keeps you on route.
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Sun protection (sunglasses, sunscreen) — Quality sunglasses prevent snow blindness and reduce eye strain during long days on exposed trails or ridgelines.
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First aid kit — Adhesive bandages, antiseptic, and athletic tape handle the most common trail injuries and weigh under a pound.
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Extra food — Blood sugar drops fast during sustained effort outdoors, and having a reserve keeps your body and mind sharp.
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Headlamp with extra batteries — Batteries drain faster in cold weather; carrying spares ensures you won't be left in the dark when you need light most.
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Fire starter — Starting a fire boosts morale and provides light, warmth, and a way to purify water in an emergency.
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Emergency shelter (space blanket) — If an injury forces you to stop moving, a reflective blanket prevents the rapid heat loss that leads to hypothermia.
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Knife or multi-tool — In a survival situation, a blade lets you process tinder, build shelter, and prepare food.
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Extra clothing layer — Wet clothing accelerates cooling; a dry backup layer can prevent hypothermia when conditions turn.
Terrain Gear
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Wide-brim hat — Desert and alpine environments with little tree cover leave you fully exposed; a hat is your primary shade source.
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Sunscreen SPF50+ — Apply 30 minutes before exposure and reapply every 2 hours; sweating and pack straps rub sunscreen off faster than expected.
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Extra water (desert) — Even well-mapped springs can go dry after low-snowpack years; always carry surplus and check recent trip reports.
Seasonal Gear
- Spring: Camera, Wildflower field guide
- Fall: Camera, Binoculars (foliage viewing)
Activities & Best Time to Visit Buenos Aires National Wildlife Refuge (E, 9mi), Pima
The Desert terrain here lends itself to a range of outdoor activities throughout the year.
The mix of Desert terrain and Unknown conditions here supports everything from birdwatching, photography, picnicking.
The scenery here earns a 60/100 photography rating — Exceptional dark sky (Bortle 1-2) and 2 excellent meteor showers.
Activities
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birdwatching — Quiet observation often leads to rewarding encounters.
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photography — Outdoor photography invites you to slow down and frame the beauty around you.
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picnicking — Whether lakeside or in a meadow, it's a relaxed way to savor both the setting and the company.
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walking — Perfect for all ages, a casual walk can turn any outdoor space into a relaxing nature experience.
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wildlife_viewing — Bring binoculars and patience — nature often rewards careful, respectful observers.
Best months: May, Jun, Jul, Aug, Sep
Terrain: Desert — Rocky outcrops, sand, and dry washes are common features.
Nature & Wildlife at Buenos Aires National Wildlife Refuge (E, 9mi), Pima
The Desert terrain here supports a rich ecosystem worth noticing as you explore.
The ecosystem around Buenos Aires National Wildlife Refuge is defined by its Desert landscape, supporting everything from Arizona sycamore and silverleaf oak to Ruddy Duck and Rock Pigeon.
Trees (2)
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Arizona sycamore — Arizona sycamore is a riparian tree with mottled white and tan exfoliating bark. -
silverleaf oak — Silverleaf oak is an evergreen oak with narrow gray-green leaves.
Wildflowers (1)
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Arizona poppy — Low mounded annual with silky petals.
Shrubs (4)
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Creosote Bush — Bright yellow flowers bloom after rain. -
tree cholla — Tree cholla is an upright cactus with cylindrical segmented stems covered in barbed spines. It can reach 8 to 15 feet tall. -
Engelmann's Hedgehog Cactus — Engelmann's hedgehog cactus is a low, clumping barrel cactus with cylindrical stems covered in dense radial spines. Flowers are large and showy, typically magenta to pink, blooming in late spring.
Other Plants (5)
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fishhook barrel cactus
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ocotillo
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rainbow hedgehog cactus
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Palmer's agave
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saguaro
Mammals (5)
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White-tailed Deer — Bucks grow antlers annually, shedding them each winter. -
Arizona Gray Squirrel — Strong climber in riparian forests. -
White-nosed Coati — Often carries tail upright when moving. -
Pronghorn — Built for speed with long legs and large lungs. -
Rock Squirrel — Often stands upright on rocks to scan for predators.
Birds (30)
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Ruddy Duck — Stiff upright tail -
Rock Pigeon — Dark charcoal form with iridescent neck -
Ring-necked Duck — Subtle chestnut neck ring rarely visible -
Gambel's Quail — Forward-curving head plume -
Neotropic Cormorant — Yellow facial skin
Reptiles (9)
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Yarrow's Spiny Lizard — Typically 5–8 inches long. -
Western Diamond-backed Rattlesnake — Adults commonly 3–5 feet long. -
Ornate Tree Lizard — Typically 4–6 inches long. -
Clark's Spiny Lizard — Usually 5–8 inches long. -
Sonoran Spotted Whiptail — Usually 8–12 inches long.
Amphibians (3)
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Sonoran Desert Toad -
Canyon Tree Frog -
Red-spotted Toad
Insects (20)
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Marine Blue -
Pipevine Swallowtail -
Arizona Sister -
American Snout -
Bordered Patch
Other Wildlife (1)
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Stripe-tailed Scorpion
Nature Bingo at Buenos Aires National Wildlife Refuge (E, 9mi), Pima
Can you spot them all? Check off each species as you find it on your visit.
Wildlife Challenge
Botany Challenge
Buenos Aires National Wildlife Refuge (E, 9mi), Pima Climate & Sun
The numbers behind the best (and worst) times to visit Buenos Aires National Wildlife Refuge.
Month-by-month temperatures at Buenos Aires National Wildlife Refuge range from °F to °F.
Climate type: Unknown
| Month | Avg Temp | Precip |
|---|---|---|
| Jan | 0°F | 1.0 in |
| Feb | 0°F | 0.9 in |
| Mar | 0°F | 0.5 in |
| Apr | 0°F | 0.3 in |
| May | 0°F | 0.1 in |
| Jun | 0°F | 0.6 in |
| Jul | 0°F | 4.3 in |
| Aug | 0°F | 2.9 in |
| Sep | 0°F | 2.8 in |
| Oct | 0°F | 0.8 in |
| Nov | 0°F | 0.7 in |
| Dec | 0°F | 1.5 in |
Daylight & Sun Times
Daylight ranges from 10.1 hours in winter to 14.2 hours in summer — a difference of 4.1 hours.
Summer: 5:19 AM – 7:30 PM
Winter: 7:16 AM – 5:23 PM
Buenos Aires National Wildlife Refuge (E, 9mi), Pima Trip Planning & Access
Time to plan the details — access, cost, and travel information for your visit.
Access to Buenos Aires National Wildlife Refuge is primarily via Phoenix, 139 miles away.
Visitor Friendliness
Accessibility: dog-friendly (unknown), family-friendly (unknown), elderly-friendly (unknown).
- Beginners: Perfect for beginners (Easy difficulty - perfect for beginners (+20))
- Accessibility: Generally accessible to most visitors (100/100)
Places Near Buenos Aires National Wildlife Refuge (E, 9mi), Pima
Looking for more? Here's what else is close by.
The region around Buenos Aires National Wildlife Refuge is rich with options — 15 nearby destinations are worth exploring.
Nearby Trails
- Mission Trail, AZ 13.84 mi
- Anza Trail Connector, Tumacácori NHP 13.92 mi
- River Overlook Trail, Tumacácori NHP 14.12 mi
- Juan Baptista de Anza National Historic Trail, Tumacácori NHP 14.72 mi
- Calabazas Visitor Trail, Tumacácori NHP 20.29 mi
Nearby Campgrounds
Nearby Attractions
Stargazing & Night Sky at Buenos Aires National Wildlife Refuge (E, 9mi), Pima
Clear nights in this area reveal more stars than most people expect.
Light pollution at Buenos Aires National Wildlife Refuge is Typical truly dark site (Bortle 2), which means bright constellations and planets are visible.
Constellations
Key constellations visible from this latitude include Ursa Minor, Cepheus.
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Ursa Minor — Visible throughout the year in much of the United States, Ursa Minor rotates steadily around the North Celestial Pole. -
Cepheus — Though its stars are modest in brightness, Cepheus is visible year-round from most of the U.S.
Meteor Showers
The Geminids peaks around December 13-14 and is the best meteor shower visible from here.
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Geminids — peaks December 13-14 (excellent)Find a dark location away from city lights and give your eyes 20–30 minutes to adjust for peak rates.
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Quadrantids — peaks January 3-4 (excellent)Look toward the northern sky after midnight for the highest activity.
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Perseids — peaks August 11-13 (good)Expect fast, bright meteors and occasional fireballs under dark skies.
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Eta Aquariids — peaks May 5-6 (good)Plan for early morning viewing; activity increases in the hours just before sunrise.
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Delta Aquariids — peaks July 28-29 (fair)Southern states often see stronger activity due to radiant placement.
Planets
Planets visible to the naked eye from this location:
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Venus — The brightest planet, often called the Morning or Evening Star -
Jupiter — The largest planet, bright and steady in the night sky -
Saturn — Famous for its rings, visible as a golden steady light -
Mars — The Red Planet, recognizable by its reddish-orange hue
Equipment Guide
- Naked eye: Venus, Jupiter, Saturn, Mars, Mercury (with care)
- Binoculars: Jupiter moons, Uranus, Saturn rings (barely)
- Small telescope: Saturn rings, Jupiter bands, Mars surface features, Neptune
Viewing Tips
- Check planets rise/set times for your specific date
- Planets appear along the ecliptic (zodiac path)
- Planets don't twinkle like stars - steady light
- Venus and Jupiter are unmistakable - brightest objects after Moon
- Use a stargazing app to confirm planet positions
- Best viewing: when planet is highest in sky (transit)
Best Viewing Months
- Evening: Oct, Nov, Dec, Jan, Feb
- Morning: Jul, Aug, Sep
Seasonal Highlights at Buenos Aires National Wildlife Refuge (E, 9mi), Pima
What you'll encounter here shifts with the calendar — here's a seasonal overview.
Seasonal changes at Buenos Aires National Wildlife Refuge bring — each offering a distinct experience.
Spring Wildflowers
Peak bloom: March - April
Check local park websites for bloom reports
Fall Foliage
Peak color: October 25 – November 15
Best trees for color: Maple, Oak, Aspen
Higher elevations peak 1-2 weeks earlier
Bird Migration
Spring peak: March - April
Fall peak: October - November
Best spots: Wetlands, coastlines, mountain ridges
Indigenous Land at Buenos Aires National Wildlife Refuge (E, 9mi), Pima
The history of this land reaches back long before it became a recreation destination.
We acknowledge that Buenos Aires National Wildlife Refuge is located on the traditional lands of O’odham Jeweḍ, Tohono O’odham.
Territories
Languages
The languages traditionally spoken in this area include Tohono O’odham, Pima.
Data from Native Land Digital
Buenos Aires National Wildlife Refuge (E, 9mi), Pima Geology & Natural History
Beyond the trails and wildlife, Buenos Aires National Wildlife Refuge sits within a landscape shaped by millions of years of geological processes. Here's what researchers and surveys have documented about this area.
Bedrock Geology
- Rock Type
- Pliocene to middle Miocene deposits
- Lithology
- Major:{conglomerate,sandstone}, Minor:{mudstone,siltstone,limestone,gypsum}
- Age
- Cenozoic
Mineral Deposits
- Deposit Sites
- 315
- Richness
- Exceptional
- Minerals Found
- Gold, Silver, Copper, Lead, Tungsten, Zinc
Endangered Species
- Species at Risk
- 1478
- ESA Endangered
- 29
- ESA Threatened
- 16
- Conservation Score
- 100/100
Temperature Records
- Record High
- 116°F (1917-06-19)
- Record Low
- 4°F (2013-01-12)
Wildfire History
This area has a relatively low wildfire risk, but always follow posted fire regulations.
- Recorded Fires
- 93
- Largest Fire
- Murphy (70,739.2 acres)
- Most Recent
- 2024
- Fire Risk
- Extreme
Watershed
- Watershed
- Papalote Wash
- Water Quality (Good)
- 0%
- Impaired
- 0%
Meteorite Landings
- Meteorites Found
- 1
- Largest
- Arivaca (0 kg)
Reported Phenomena
- UFO Sightings
- 10 (NUFORC)
- Eeriness Score
- 20/100
Buenos Aires National Wildlife Refuge (E, 9mi), Pima Safety & Conditions
Plans set? Check the latest conditions before you head out.
Up-to-date weather, fire, and flood information for the area around Buenos Aires National Wildlife Refuge.
Coordinates: 31.548665, -111.28518