Ernie's Falls Trail, Saguaro National Park
Trails in Arizona
Photo: Mike Ostrowski / CC BY-SA 4.0
Part of Saguaro National Park
What to Pack for Ernie's Falls Trail, Saguaro National Park
The right gear makes all the difference — here's a packing list tailored to this area.
Your packing list for Ernie's Falls Trail should account for the Shrubland terrain and Semi-Arid.
Essential
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Water (minimum 2L) — Water sources marked on maps may be seasonal or dry; carrying enough to complete your route prevents a dangerous shortfall.
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Navigation (map/GPS/compass) — Getting lost is the leading cause of backcountry search-and-rescue calls; reliable navigation prevents the situation entirely.
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Sun protection (sunglasses, sunscreen) — Prolonged sun exposure causes headaches, fatigue, and heat exhaustion that can cut a trip short or create a medical emergency.
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First aid kit — Remote locations mean longer response times for help; a first aid kit bridges the gap between injury and professional care.
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Extra food — High-energy snacks weigh little but provide crucial fuel if you need to bushwhack out or wait for conditions to improve.
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Headlamp with extra batteries — Hands-free light is essential for navigating uneven terrain, setting up camp, or signaling for help at night.
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Fire starter — Waterproof matches or a ferro rod weigh almost nothing and can be the difference between a cold night and a survivable one.
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Emergency shelter (space blanket) — Wind and rain strip heat faster than most people realize; a compact emergency shelter blocks both.
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Knife or multi-tool — A multi-tool handles problems you can't predict: jammed zippers, tangled line, first-aid tape cutting, or gear fixes on the trail.
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Extra clothing layer — A lightweight fleece or puffy stuffs small but provides critical insulation if temperatures drop unexpectedly.
Wildlife Gear
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Hiking buddy (avoid solo) — A companion can help with first aid, signaling, and decision-making if a wildlife encounter turns serious.
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Noise maker — Group noise is especially important in dense brush or near berry patches where bears may be feeding and less alert.
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Gaiters — Thick gaiters deflect fangs before they reach skin, buying critical time in areas with rattlesnakes or copperheads.
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First-aid snakebite kit — Knowing how to immobilize a limb, mark swelling progression, and avoid harmful folk remedies can improve outcomes.
Seasonal Gear
- Spring: Camera, Wildflower field guide
- Fall: Camera, Binoculars (foliage viewing)
Activities & Best Time to Visit Ernie's Falls Trail, Saguaro National Park
The Shrubland terrain here lends itself to a range of outdoor activities throughout the year.
Visitors come to Ernie's Falls Trail primarily for hiking, though the Shrubland terrain opens up other options too.
With a photography score of 55/100, Ernie's Falls Trail offers Good dark sky (Bortle 3) and 3 excellent meteor showers worth capturing.
Activities
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hiking — Hiking ranges from gentle nature walks to challenging summit climbs.
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photography — Golden hour and dramatic weather can transform ordinary scenes into striking images.
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picnicking — Picnicking turns a scenic overlook or shady grove into a memorable gathering spot.
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running — Trail running combines endurance with changing terrain and natural views.
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soaking — Warm mineral waters provide a soothing outdoor experience.
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walking — Walking lets you slow down and notice details — wildflowers, birdsong, shifting light through trees.
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wildlife_viewing — Early mornings and dusk offer the best chances to quietly spot native wildlife.
Best months: May, Jun, Jul, Aug, Sep
Terrain: Shrubland — Dense shrubs and brush dominate this terrain, frequently forming thick thickets across rolling hills or dry slopes.
Wildlife Safety at Ernie's Falls Trail, Saguaro National Park
Most wildlife encounters are positive, but a few potential hazards are worth knowing about.
The danger rating here is 30/10 — Mountain lions and Venomous snakes.
- Mountain lions
- Venomous snakes
- Remote (118mi from city)
- Good dark sky (Bortle 3)
- 3 excellent meteor showers
- Fall foliage
- Spring wildflowers
Venomous Snakes
Watch your step — Western Diamondback, Mojave, Sidewinder, Arizona Coral Snake are present in the Shrubland habitat around Ernie's Falls Trail.
Typically gray to brown with sharply defined dark diamonds bordered in pale scales.
Remove constrictive items and remain calm; do not cut, suck, or apply ice to the wound.
Color ranges from greenish-gray to brown, often blending with desert soils.
Keep the victim calm and monitor breathing while awaiting medical care.
Light tan or sandy coloration with darker blotches along the back.
Do not attempt to capture the snake; focus on reaching emergency care quickly.
Red bands touch yellow bands, a key identifying feature.
Keep the victim calm and still while awaiting treatment.
- Watch where you step and place hands
- Stay on trails
- Wear boots and long pants in snake country
- Do not reach under rocks or logs
- If bitten: stay calm, immobilize limb, seek medical help immediately
- Do NOT: cut wound, suck venom, apply tourniquet, ice, or alcohol
Nature & Wildlife at Ernie's Falls Trail, Saguaro National Park
The Shrubland terrain here supports a rich ecosystem worth noticing as you explore.
The forests and meadows around Ernie's Falls Trail support a diverse community of wildlife, from White-tailed Deer and Arizona Gray Squirrel 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 — Finely divided gray-green foliage.
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 — Slender build with long legs and large dark eyes. -
Arizona Gray Squirrel — Distinct from eastern gray squirrels by range. -
White-nosed Coati — Slender body with elongated snout. -
Pronghorn — Both sexes have short, curved horns with a forward prong. -
Rock Squirrel — Stouter and larger than many other ground squirrels.
Birds (30)
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Ruddy Duck — Brown winter plumage -
Rock Pigeon — White or mottled urban color morphs -
Ring-necked Duck — Female brown with white eye ring -
Gambel's Quail — Black face patch -
Neotropic Cormorant — Long tail
Reptiles (9)
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Yarrow's Spiny Lizard — Often shows dark crossbands and subtle patterning. -
Western Diamond-backed Rattlesnake — Black-and-white banded tail ending in a rattle. -
Ornate Tree Lizard — Males may show bluish patches on the belly. -
Clark's Spiny Lizard — Males may show blue markings on the throat and belly. -
Sonoran Spotted Whiptail — Long tail and smooth scales.
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 Ernie's Falls Trail, Saguaro National Park
Can you spot them all? Check off each species as you find it on your visit.
Wildlife Challenge
Botany Challenge
Ernie's Falls Trail, Saguaro National Park Climate & Sun
Month-by-month climate and daylight information for Ernie's Falls Trail.
Ernie's Falls Trail experiences Semi-Arid conditions with average temperatures ranging from °F in to °F in .
Climate type: Semi-Arid
Annual avg temp: 64.6°F
Annual precipitation: 15.6 in
With an average annual temperature of 64.6°F and 15.6 inches of precipitation, Ernie's Falls Trail has warm, dry conditions. Summer highs average around 82°F, while winter lows drop to 49°F.
Best months to visit: Feb, Mar, Apr, May, Oct, Nov.
| Month | Avg Temp | Precip |
|---|---|---|
| Jan | 49°F | 1.5 in |
| Feb | 50°F | 1.2 in |
| Mar | 56°F | 1.0 in |
| Apr | 62°F | 0.4 in |
| May | 70°F | 0.3 in |
| Jun | 80°F | 0.4 in |
| Jul | 82°F | 3.0 in |
| Aug | 80°F | 2.8 in |
| Sep | 76°F | 1.8 in |
| Oct | 67°F | 0.8 in |
| Nov | 57°F | 0.8 in |
| Dec | 48°F | 1.6 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: 5:15 AM – 7:30 PM
Winter: 7:16 AM – 5:19 PM
Ernie's Falls Trail, Saguaro National Park Trip Planning & Access
Ready to visit? Here's what to know about getting here and what it'll cost.
Getting to Ernie's Falls Trail means a 118-mile drive from Phoenix, the closest major city.
Visitor Friendliness
Visitor friendliness: families (good), dogs (likely_allowed), elderly (moderate).
- Dogs: likely_allowed — No restrictions found
- Families: good (Long distance (>5mi))
- Elderly: moderate (Long distance (>2mi), Unpaved surface)
- Strollers: possible (50/100)
- Beginners: Good starting point (Moderate difficulty (+5))
- Accessibility: Generally accessible to most visitors (90/100)
Places Near Ernie's Falls Trail, Saguaro National Park
If you're in the area, these nearby destinations are worth considering too.
The area around Ernie's Falls Trail includes trails, campgrounds, and other destinations.
Nearby Trails
Nearby Campgrounds
Stargazing & Night Sky at Ernie's Falls Trail, Saguaro National Park
If you're staying past sunset, the stargazing conditions here are worth planning around.
With Bortle class 3 skies, Ernie's Falls Trail offers Rural sky conditions for observing the night sky.
Constellations
Look for Ursa Minor, Cepheus — all visible from this location depending on the season.
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Ursa Minor — This compact constellation contains Polaris at the end of its handle, a reliable guide to true north. -
Cepheus — Named for a mythological king, this constellation sits beside Cassiopeia and is circumpolar in northern latitudes.
Meteor Showers
For meteor viewing, the Geminids (December 13-14) offers the best show at this location.
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Geminids — peaks December 13-14 (excellent)Cold December air often means clear skies—look overhead after midnight for bright, slow-moving meteors.
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Quadrantids — peaks January 3-4 (excellent)Bundle up—January nights are frigid, but dark skies can produce bright fireballs.
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Perseids — peaks August 11-13 (excellent)Peak activity typically builds after midnight when Perseus climbs higher.
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Eta Aquariids — peaks May 5-6 (good)Southern U.S. observers often get better rates due to the radiant's position.
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Delta Aquariids — peaks July 28-29 (fair)This steady shower rewards patient observers in dark, moonless conditions.
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 Ernie's Falls Trail, Saguaro National Park
Each season brings something different to this area.
What you'll see at Ernie's Falls Trail depends heavily on when you visit.
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 Ernie's Falls Trail, Saguaro National Park
Long before trails were marked and campgrounds built, this land was home to Indigenous peoples.
This area is part of the ancestral territory of O’odham Jeweḍ, Sobaipuri, Tohono O’odham.
Territories
Languages
2 Indigenous languages are associated with the peoples of this area: Tohono O’odham, Pima.
Data from Native Land Digital
Ernie's Falls Trail, Saguaro National Park Geology & Natural History
Beyond the trails and wildlife, Ernie's Falls Trail 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
- Early Tertiary to Late Cretaceous muscovite-bearing granitic rocks
- Formation
- Wilderness Granite; Pan Tak Granite
- Lithology
- Major:{granite}, Minor:{pegmatite}
- Age
- Thanetian
Fossils
- Fossil Occurrences
- 65
- Unique Species
- 63
- Oldest
- 129,000 years ago
Mineral Deposits
- Deposit Sites
- 148
- Richness
- Exceptional
- Minerals Found
- Copper, Tungsten, Gold, Sand and Gravel, Construction, Silver, Lead, Geothermal
Endangered Species
- Species at Risk
- 1478
- ESA Endangered
- 29
- ESA Threatened
- 16
- Conservation Score
- 100/100
Temperature Records
- Record High
- 118°F (1990-06-27)
- Record Low
- -7°F (1985-02-02)
Wildfire History
This area has a relatively low wildfire risk, but always follow posted fire regulations.
- Recorded Fires
- 125
- Largest Fire
- BIGHORN (119,634.5 acres)
- Most Recent
- 2024
- Fire Risk
- Extreme
Watershed
- Watershed
- Sabino Creek
- Water Quality (Good)
- 16.155%
- Impaired
- 0%
Meteorite Landings
- Meteorites Found
- 1
- Largest
- Udall Park (0.2 kg)
Filming Locations
- Productions Filmed
- 3
- Notable Films
- The Dentist, Tin Cup, Alice Doesn't Live Here Anymore
Reported Phenomena
- UFO Sightings
- 243 (NUFORC)
- Haunted Places
- 22 (Shadowlands)
- Eeriness Score
- 60/100
Ernie's Falls Trail, Saguaro National Park Safety & Conditions
Conditions change fast outdoors — bookmark these official sources for your visit.
Real-time safety data for Ernie's Falls Trail — weather, fire, flood, and road conditions.
Coordinates: 32.228411, -110.654853