Joshua Tree Waterfall

Joshua Tree National Park is renowned for its alien-like rock formations, desert flora, and surreal Joshua trees, not for its water features. However, hidden in rocky canyons and remote corners of the park, waterfalls do exist—but only after heavy rains. These ephemeral waterfalls (temporary cascades) offer a rare spectacle in this arid landscape, rewarding intrepid visitors who time their trips just right.

Here’s a look at the few locations where waterfalls can appear in Joshua Tree:

Quick Reference: Waterfalls in Joshua Tree National Park

Waterfall / Location	Region / Access	Trail / Distance	Waterfall Type	Key Features	Best Time to See It
49 Palms Canyon Waterfall	North side of the park near Twentynine Palms	49 Palms Oasis Trail — 3 miles round trip	Seasonal cascade	Appears before or beyond the oasis; dramatic flow after storms; fan palm oasis	Right after winter rainstorms (Dec–Mar) and during monsoon season (Jul–Sep)
Rattlesnake Canyon Waterfalls	Indian Cove Area — off-trail access	No formal trail; requires scrambling	Cascading runoff over granite boulders	Series of small waterfalls and pools; rugged bouldering route	Immediately after strong rainstorms in winter or early spring
Barker Dam Overflow	Central park near Hidden Valley	Barker Dam Loop — 1.1 miles	Man-made spillover and rain-runoff cascade	Overflow from dam wall creates trickling falls; small natural falls nearby after rain	Following substantial winter rains
Lost Horse Valley Rock Runoff	Lost Horse Road / Keys Ranch region	Off-trail or guided area	Short-lived storm runoff	Water channels through granite cracks and rock faces; unofficial and unnamed features	Within hours after intense monsoon storms
Cottonwood Spring Area	Southern park — near Cottonwood Visitor Center	Cottonwood Spring Trail or Mastodon Peak Loop	Spring-fed flow with seasonal rain cascades	Underground spring plus occasional rain-fed cascades in washes and canyons	During or shortly after major rain events

1. 49 Palms Canyon Waterfall

Location: 49 Palms Oasis Trail (north side of the park near Twentynine Palms)

Trail Distance: 3 miles round trip

Elevation Gain: ~350 feet

Waterfall Type: Seasonal cascade

49 Palms Canyon is the most reliable location for seeing a waterfall in Joshua Tree—if there's been recent rain. The hike leads to a natural oasis of native fan palms fed by a year-round spring. But after storms, water flows more dramatically, forming a temporary waterfall cascading down the canyon walls just before or beyond the oasis.

This waterfall typically lasts only a few hours to a couple of days, depending on the intensity of rainfall. The sight of water flowing over granite cliffs amidst fan palms is stunning and surreal.

Best time to see it:

◉ Right after winter rainstorms (December–March)

◉ During the desert monsoon season (July–September)

2. Rattlesnake Canyon Waterfalls

Location: Indian Cove area (northeast section of the park)

Access: No formal trail; requires scrambling

Waterfall Type: Cascading runoff over granite boulders

Rattlesnake Canyon is a lesser-known but dramatic spot in Joshua Tree. After rainfall, water flows down the boulder-choked canyon in a series of small waterfalls and pools. These are not towering falls, but rather gentle cascades and rivulets that wind their way through the granite, occasionally forming shallow basins.

This area is not suitable for all hikers—there’s no maintained trail, and navigating the terrain requires bouldering and route-finding. However, it can be highly rewarding for adventurous visitors seeking to see water in motion in the high desert.

Best time to see it:

◉ Immediately after strong rainstorms (especially in winter or early spring)

3. Barker Dam Overflow

Location: Barker Dam Trail (central park area, near Hidden Valley)

Trail Distance: 1.1-mile loop

Waterfall Type: Man-made spillover and possible runoff cascade

Barker Dam is a historic man-made water reservoir, built by ranchers in the early 1900s to collect rainwater and snowmelt. The dam itself doesn’t create a waterfall in the traditional sense, but when the reservoir fills, overflow from the dam wall can create a trickling cascade down the rocks.

Additionally, after heavy rains, natural runoff may form temporary small waterfalls nearby in the surrounding canyon walls, especially along the granite formations on the return half of the loop trail.

Best time to see it:

◉ After substantial winter rains

4. Lost Horse Valley Rock Runoff

Location: Along Lost Horse Road and Keys Ranch area

Access: Requires off-trail exploration or guided tours

Waterfall Type: Unofficial, short-lived runoff falls

The granite hills of Lost Horse Valley can channel water during intense rainstorms, creating very short-lived runoff waterfalls in cracks and natural channels. These waterfalls are not always visible and do not have official names or trails. Still, keen observers may spot water streaming down rock faces or pooling at the base of cliffs.

These features are particularly dependent on flash floods and require luck and precise timing to witness.

Best time to see it:

◉ Within hours after monsoon storms

5. Cottonwood Spring Area

Location: Southern section of the park (near Cottonwood Visitor Center)

Trail Options: Cottonwood Spring Trail, Mastodon Peak Loop

Waterfall Type: Spring-fed runoff with occasional rain-fed cascades

Cottonwood Spring is a perennial water source formed by underground seismic activity that forced groundwater to the surface. While the spring itself does not create a full waterfall, after heavy rainfall, small cascades can form in the nearby canyons and washes, especially heading toward the Mastodon Peak area.

These are usually small rock cascades or water trickles, but in a place as dry as Joshua Tree, even a steady stream can feel like a miracle.

Best time to see it:

◉ During or shortly after major rain events