Parks 862 ft Bortle 2 Solitude: 90/100 (remote)

Remember your OUTDOOR ETHICS when enjoying your public lands. Please RECREATE RESPONSIBLY. Overview The Riverside Mountains Wilderness encompasses 24,004 acres and is managed by the BLM's Palm Springs-South Coast Field Office . In 1994 the Riverside Mountains Wilderness became part of the now over 109 million acre National Wilderness Preservation System. The Colorado River parallels this wilderness on its eastern edge. The landscape varies from gently sloping bajadas to steep, rugged interiors. Washes emerging from canyons divide the bajadas below. Numerous peaks in the Riverside Mountains give this small range a rough, craggy appearance. The foxtail cactus and California barrel cactus, two sensitive plant species, decorate this wilderness. A small herd of burro deer live among the Riverside range. In wilderness, you can enjoy challenging recreational activities and extraordinary opportunities for solitude. In an age of "...increasing population, accompanied by expanding settlement and growing mechanization,..." you play an important role in helping to "...secure for the American people of present and future generations the benefits of an enduring resource of wilderness" as called for by Congress in the Wilderness Act of 1964 . Please follow the regulations in place for this area, and use Leave No Trace techniques when visiting to ensure protection of its unique natural and experiential qualities. How to follow the seven standard Leave No Trace principles differs in different parts of the country (desert vs. Rocky Mountains). Click on any of the principles listed below to learn more about how they apply. Leave No Trace principles: Plan Ahead and Prepare Travel and Camp on Durable Surfaces Dispose of Waste Properly Leave What You Find Minimize Campfire Impacts Respect Wildlife Be Considerate of Other Visitors Regulations: Motorized equipment and equipment used for mechanical transport are generally prohibited on all federal lands designated as wilderness. This includes the use of motor vehicles (including OHVs), motorboats, motorized equipment, bicycles, hang gliders, wagons, carts, portage wheels, and the landing of aircraft including helicopters, unless provided for in specific legislation.

Near Poston, AZ in Arizona

What to Pack for Riverside Mountains Wilderness, Riverside

Being properly equipped turns potential hazards into manageable situations.

This packing list is tailored to the Desert environment and Mediterranean at Riverside Mountains Wilderness.

Essential

Water (minimum 2L) — Dehydration impairs judgment and endurance long before you feel thirsty; 2L is the minimum for a moderate day hike.
Navigation (map/GPS/compass) — Phone batteries die, cell service disappears, and trail signs get vandalized; a paper map and compass always work.
Sun protection (sunglasses, sunscreen) — UV exposure intensifies at elevation and near reflective surfaces like water and snow; sunburn can happen in under 30 minutes.
First aid kit — Blisters, cuts, and sprains happen on even the easiest trails; basic supplies let you treat problems before they force a retreat.
Extra food — A wrong turn or unexpected storm can extend any outing by hours; extra calories prevent fatigue and poor decision-making.
Headlamp with extra batteries — Trails that seem short in daylight can take twice as long with route-finding or elevation; a headlamp keeps you moving safely after dark.
Fire starter — Hypothermia can set in even during summer at higher elevations; a reliable fire starter provides warmth and a signal for rescuers.
Emergency shelter (space blanket) — A space blanket weighs under two ounces and reflects up to 90% of body heat, buying time in an unplanned overnight.
Knife or multi-tool — From cutting cord to preparing food to improvising gear repairs, a knife is the most versatile tool you can carry.
Extra clothing layer — Mountain weather can shift from sunshine to sleet within an hour; an extra layer prevents dangerous heat loss.

Wildlife Gear

Hiking buddy (avoid solo) — Groups of three or more are almost never involved in serious bear incidents; larger groups make more noise and appear more intimidating.
Noise maker — Clapping, whistling, or using an air horn warns wildlife of your approach, preventing surprise encounters on blind corners.
Gaiters — Snake-proof gaiters provide a physical barrier against venomous bites below the knee, where most strikes occur.
First-aid snakebite kit — While evacuation to a hospital is the priority, a snakebite kit helps you stay calm and follow proper first-aid protocols.

Climate Gear

Extra water (1L/hr) — In high-heat conditions, your body can sweat 1-2 liters per hour; matching that rate prevents the dangerous spiral of dehydration.
Electrolytes — Sweating depletes sodium and potassium that plain water can't replace; electrolyte tablets prevent the muscle cramps and fatigue of hyponatremia.
Cooling towel — A wet towel on your neck cools blood flowing to your brain, providing immediate relief from heat stress.
Layering system (wide temp swings) — Desert and mountain environments can swing 40+ degrees between dawn and midday; layers let you adapt without overheating or freezing.

Terrain Gear

Wide-brim hat — A wide brim shades your face, ears, and neck simultaneously, reducing UV exposure and lowering heat stroke risk.
Sunscreen SPF50+ — Reflected UV from water, sand, and snow can burn exposed skin even on overcast days; SPF50+ blocks 98% of UVB rays.
Extra water (desert) — Desert water sources are unreliable and often seasonal; carry all the water you need rather than counting on finding more.

Seasonal Gear

Spring: Camera, Wildflower field guide
Fall: Camera, Binoculars (foliage viewing)

Activities & Best Time to Visit Riverside Mountains Wilderness, Riverside

The Desert terrain here lends itself to a range of outdoor activities throughout the year.

The terrain here lends itself to atv, backpacking, fishing — activities that match the Desert environment.

Photographers rate this area 65/100, with Exceptional dark sky (Bortle 1-2) and 3 excellent meteor showers being a major draw.

Activities

atv — Ride designated off-highway vehicle trails on an all-terrain vehicle.
backpacking — Carry your gear into the backcountry for multi-day hiking adventures.
fishing — Cast a line in lakes, rivers, or coastal waters in pursuit of local fish species.
hiking — Follow marked trails through forests, deserts, or alpine terrain for a deeper connection with nature.
ice_fishing — Drill through frozen lakes to fish beneath the ice during winter.
ice_skating — Glide across frozen ponds or maintained outdoor rinks during winter months.
kayaking — Paddle through calm lakes, winding rivers, or coastal inlets in a small, maneuverable craft.
mountain_biking — Ride off-road trails that wind through forests, deserts, and mountain terrain.
off_roading — Navigate rugged trails and backcountry routes with high-clearance vehicles.
photography — Capture landscapes, wildlife, and changing light across trails, coastlines, and mountain vistas.
picnicking — Spread a blanket, unpack a meal, and enjoy food outdoors surrounded by fresh air and open views.
rock_climbing — Ascend vertical rock faces using ropes, harnesses, and protective gear.
rv_camping — Travel with the comforts of home while staying in campgrounds or RV parks.
surfing — Ride ocean waves along sandy beaches and coastal breaks.
walking — A simple way to explore trails, shorelines, and park paths at your own pace while taking in the scenery.
wildlife_viewing — Observe animals in their natural habitats, from grazing deer to soaring raptors overhead.

Best months: May, Jun, Jul, Aug, Sep

Terrain: Desert — Desert terrain features sparse vegetation, exposed soils, and wide temperature swings between day and night.

Wildlife Safety at Riverside Mountains Wilderness, Riverside

Part of visiting responsibly is understanding the wildlife safety considerations for this area.

The wildlife safety profile at Riverside Mountains Wilderness includes venomous snakes — here's what to know about each.

Danger rating: 30/100 (based on terrain difficulty, wildlife presence, weather exposure, and remoteness) moderate

Mountain lions
Venomous snakes
Remote (148mi from city)

UV risk: extreme (Southern latitude (34N), Desert (exposed))

Photo score: 65/100

Exceptional dark sky (Bortle 1-2)
3 excellent meteor showers
Fall foliage
Spring wildflowers

Venomous Snakes

Venomous snakes here include . They're most active during warm months.

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 Riverside Mountains Wilderness, Riverside

The Desert terrain here supports a rich ecosystem worth noticing as you explore.

The natural world around Riverside Mountains Wilderness reflects its Desert setting — Smoketree overhead, Birdcage Evening Primrose and desert lily at your feet, and wildlife throughout.

Trees (1)

Smoketree — Fall foliage may turn yellow.

Wildflowers (4)

Birdcage Evening Primrose — Yellow four-petaled flowers on slender stems.
desert lily — Tall stalk with large white funnel-shaped flowers.
Desert Sunflower — Bright yellow ray flowers with dark centers.
Thickleaf Groundcherry — The plant forms low spreading clumps.

Shrubs (3)

Creosote Bush — Bright yellow flowers bloom after rain.
Burrobush — Forms rounded mounds in arid landscapes.
Brittlebush — Leaves are soft and pale gray, contrasting with long-stemmed golden blooms.

Other Plants (5)

desert milkweed
Spanish needle
Sacred Datura
desert sand verbena
rush milkweed

Mammals (1)

Kit Fox — A small fox with pale gray-tan coat and large ears.

Birds (30)

Red-winged Blackbird — Male black with red and yellow shoulder patch
Rock Pigeon — Blue-gray with two black wing bars
Gambel's Quail — Gray body with chestnut flanks
Mourning Dove — Soft gray-brown body
White-crowned Sparrow — Bold black and white crown stripes

Reptiles (10)

Zebra-tailed Lizard — A slender lizard with long tail marked by bold black-and-white bands.
Mojave Fringe-toed Lizard — A pale sandy lizard with fringed scales along toes for running on dunes.
Western Whiptail — A slender, fast-moving lizard with a very long tail and distinct pale stripes over a dark body.
Desert Horned Lizard — A flattened lizard with prominent horns on the back of the head.
Sidewinder — A small rattlesnake with horn-like scales above the eyes.

Insects (11)

Inflated Beetle
Creosote Resin Gall Midge
Western Honey Bee
Painted Lady
Seven-spotted Lady Beetle

Other Wildlife (2)

Dune Scorpion
Desert Tarantula

Nature Bingo at Riverside Mountains Wilderness, Riverside

Can you spot them all? Check off each species as you find it on your visit.

Wildlife Challenge

Savannah Sparrow (bird)
Kit Fox (mammal)
Zebra-tailed Lizard (reptile)
desert milkweed (plant)

Botany Challenge

Achnatherum Pinetorum
Aquilegia Coerulea Var. Pinetorum
Arabis Holboellii Var. Pinetorum
Asclepias Engelmanniana
Echinocereus Engelmannii
Almutaster

Riverside Mountains Wilderness, Riverside Climate & Sun

Reference data: temperatures, precipitation, and daylight hours by month.

The climate at Riverside Mountains Wilderness peaks for outdoor activity during May, Jun, Jul, Aug, Sep, when temperatures average °F.

Climate type: Mediterranean

Best months to visit: Jan, Feb, Mar, Apr, Nov, Dec. Consider avoiding: Jun, Jul, Aug.

Winter 55°

0.8"

Spring 73°

0.1"

Summer 96°

0.3"

Fall 76°

0.2"

Month	Avg Temp	Precip
Jan	55°F	0.8 in
Feb	59°F	0.3 in
Mar	65°F	0.4 in
Apr	73°F	0.1 in
May	80°F	0.1 in
Jun	91°F	0.1 in
Jul	96°F	0.3 in
Aug	96°F	0.6 in
Sep	88°F	0.6 in
Oct	76°F	0.2 in
Nov	64°F	0.4 in
Dec	54°F	0.5 in

Daylight & Sun Times

Daylight ranges from 9.9 hours in winter to 14.4 hours in summer — a difference of 4.5 hours.

Summer: 4:26 AM – 6:50 PM

Winter: 6:36 AM – 4:30 PM

Winter Solstice: Sunrise 6:36 AM, Sunset 4:30 PM Golden hour from 3:52 PM

Summer Solstice: Sunrise 4:26 AM, Sunset 6:50 PM Golden hour from 6:13 PM

Spring Equinox: Sunrise 5:50 AM, Sunset 5:45 PM Golden hour from 5:12 PM

Fall Equinox: Sunrise 5:20 AM, Sunset 5:46 PM Golden hour from 5:13 PM

Riverside Mountains Wilderness, Riverside Trip Planning & Access

Here's the practical side of visiting Riverside Mountains Wilderness.

Whether it's a day trip or weekend getaway from Phoenix, here's what visiting Riverside Mountains Wilderness involves.

Nearest city: Phoenix (148 mi)

Estimated fuel cost: $37.08 (28 mpg, $3.5/gallon)

Carbon footprint: 119.9 kg CO2 (round trip by car)

Visitor Friendliness

This location rates likely_allowed for dogs, excellent for families, and highly_suitable for elderly visitors.

Dogs: likely_allowed — No restrictions found
Families: excellent
Elderly: highly_suitable
Strollers: excellent (100/100)
Beginners: Perfect for beginners (Moderate difficulty (+5), Good information available (+5))
Accessibility: Generally accessible to most visitors (90/100)

Places Near Riverside Mountains Wilderness, Riverside

The area around Riverside Mountains Wilderness has plenty more to offer.

The proximity of 7 other outdoor spots makes this area ideal for multi-day exploration.

Nearby Campgrounds

Crossroads Campsite 1, San Bernardino 24.62 mi
Crossroads Campground (N, 0mi), San Bernardino 24.62 mi
Shea Road Spectator Area, La Paz 24.89 mi

Stargazing & Night Sky at Riverside Mountains Wilderness, Riverside

After a day outdoors, the evening sky here is worth a look.

Under the Bortle class 2 skies at Riverside Mountains Wilderness, you can expect to see 2 major constellations and constellations and bright planets.

Bortle 2 Typical truly dark site

Constellations

From Riverside Mountains Wilderness, you can trace Ursa Minor, Cepheus across the sky on clear nights.

Ursa Minor — Home to Polaris, the North Star, Ursa Minor forms a small dipper shape that circles the northern sky year-round.
Cepheus — Cepheus appears as a faint house-shaped pattern near Polaris in the northern sky.

Meteor Showers

Time your visit around December 13-14 for the Geminids, the strongest meteor shower visible from this latitude.

Geminids — peaks December 13-14 (excellent)
One of the most reliable and active showers of the year; best viewed after 10 PM when Gemini rises higher in the sky.
Quadrantids — peaks January 3-4 (excellent)
This brief but intense shower peaks before dawn; early morning hours offer the best chance to see multiple meteors.
Perseids — peaks August 11-13 (excellent)
A summer favorite with warm nighttime viewing; look northeast after 10 PM.
Eta Aquariids — peaks May 5-6 (good)
Best seen before dawn in the southeastern sky as Aquarius rises.
Delta Aquariids — peaks July 28-29 (fair)
Best viewed after midnight when Aquarius is higher in the southern sky.

Planets

Planets visible to the naked eye from this location:

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 Riverside Mountains Wilderness, Riverside

The time of year you visit changes what you'll see and do.

Knowing what each season brings helps you plan the best possible visit to Riverside Mountains Wilderness.

Spring Wildflowers

Peak bloom: March - April

Check local park websites for bloom reports

Fall Foliage

Peak color: October 15 – November 5

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 Riverside Mountains Wilderness, Riverside

Before planning your trip, it's worth recognizing the Indigenous peoples connected to this land.

For thousands of years, this land has been cared for by Nüwüwü (Chemehuevi), Xawiƚƚ kwñchawaay (Cocopah), Nuwuvi (Southern Paiute) and their ancestors.

Territories

Languages

Indigenous languages connected to this territory include Nüwü Ampagap (Chemehuevi), Halchiohoma, Cocopah (Xawiƚƚ kwñchawaay).

Data from Native Land Digital

Riverside Mountains Wilderness, Riverside Geology & Natural History

Beyond the trails and wildlife, Riverside Mountains Wilderness 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: Holocene river alluvium
Lithology: Major:{sand,gravel}, Minor:{silt,clay}
Age: Holocene

Mineral Deposits

Deposit Sites: 115
Richness: Exceptional
Minerals Found: Gold, Copper, Silver, Manganese, Sand and Gravel, Construction, Clay, Gypsum-Anhydrite

Endangered Species

Species at Risk: 6148
ESA Endangered: 169
ESA Threatened: 77
Conservation Score: 100/100

Temperature Records

Record High: 127°F (1905-07-07)
Record Low: 9°F (1911-12-31)

Wildfire History

This area has a relatively low wildfire risk, but always follow posted fire regulations.

Recorded Fires: 28
Largest Fire: Lost Lake (5,856.6 acres)
Most Recent: 2024
Fire Risk: Extreme

Watershed

Watershed: Mesa Drain
Water Quality (Good): 0%
Impaired: 0%

Reported Phenomena

UFO Sightings: 9 (NUFORC)
Eeriness Score: 18/100

Riverside Mountains Wilderness, Riverside Safety & Conditions

The weather data above tells you what's typical — these links tell you what's happening right now.

Safety starts with current information. These resources cover real-time conditions near Riverside Mountains Wilderness.

Flood zone: Not in a flood zone

Nearest weather station: PARKER, AZ US (18.86 mi)