For an exciting 2.2-mile hike on an undeveloped trail through a colorful canyon, make your way to Rainbow Canyon, located south of Blair Valley in Anza-Borrego Desert State Park. A bit of scrambling is required on this hike, to climb several sloped dry falls within the canyon. There is 250 feet of elevation gain between the trailhead and the turnaround point, with plenty to see along the way.
From the unmarked trailhead along route S2, begin hiking northeast toward Rainbow Canyon. Follow the path up the wash, crossing a metal fence toward the mouth of the canyon, 1/3 of a mile from the trailhead. The alluvial fan below the canyon is surprisingly lush, populated by agave and cholla cacti. Ahead, these desert plants broaden the spectrum in the already colorful canyon. Rainbow Canyon does not appear to be a large water source, and one wonders how the vegetation can be so vibrant here. Aside from several smooth pour-overs, there is little evidence of water flowing down the canyon. Perhaps there is more going on underground than meets the eye.
Not long after entering Rainbow Canyon, and just under half a mile from the start, you will arrive at the first of eight dry falls. Make your way over the angled six-foot dry falls and continue up the canyon through pronounced rock walls. None of the dry falls are too vertical or too challenging to be climbed by fit hikers, and ropes are not needed.
Rainbow Canyon carves through metamorphic rock that has been folded over into swirling colorful patterns (kind of like a rainbow). Layers of brown, red, and yellow, stand next to blacks and grays, while veins of mineral deposits add glistening lines to the spectacle. Rainbow Canyon offers an impressive display of the geological forces at work in the Anza-Borrego Desert. Take your time, and examine all the unique rocks along the way.
After the third dry falls, and 0.7 miles from the start, stay to the right at a fork in the canyon. Ahead, a few more dry falls come in quick succession, including a fun pair of dry falls that are nearly on top of each other. This is an excellent spot to gain a perched view down Rainbow Canyon.
A dry falls in Rainbow Canyon
At mile 1.1, the canyon tapers out and widens, becoming less adventurous. The canyon continues for another two miles toward the south end of Blair Valley, but turn around here and enjoy a fun descent over the ornately colored dry falls. Juniper trees appear along the slopes at the top of the canyon, serving as an indicator that you have reached the end of the hike (if you lost count of the dry falls).
This is an action-packed hike up a less-traveled canyon. No fee or permit is required to hike Rainbow Canyon in Anza-Borrego Desert State Park, so get out and enjoy.
To get to the trailhead: From Christmas Circle in Borrego Springs, drive 5 miles southwest on Borrego Springs Road. Turn right on Route S3 (Yaqui Pass Road) and drive 7 miles south over the ridge to Tamarisk Grove. Turn right on Route 78, and head west for another seven miles to Route S2. Turn left and drive 11 mile south, passing Blair Valley, to mile marker 27.7. Park on the east shoulder of the road, on the outside of a broad curve. Pick one of a few paths leaving the road that unite in the wash below Rainbow Canyon.
Trailhead address: Route S2 (Route Great Southern Overland Stage Route of 1849), Anza-Borrego Desert State Park, Julian, CA 92036
Trailhead coordinates: 32.997806, -116.447558
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|Marshal South Home Trail|
This 1.3-mile hike ascends to the ruins of an adobe cabin on Ghost Mountain (Yaquitepec) with great views above Blair Valley.
This 0.6-mile hike visits a village of boulders once occupied by Kumeyaay Indians who left behind Morteros, grinding bowls carved into the rock.
This 1.8-mile hike visits rock paintings drawn by Kumeyaay Indians who lived in the Anza-Borrego Desert thousands of years ago.
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This 0.5-mile self-guided hike explores the geology of the park.
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