Arroyo Tapiado canyon
Arroyo Tapiado canyon
GPS N32.8955,  W-116.1789
Elevation 604 to 1,249
Season Year round: best Oct.-May
Terrain  Mostly sand washes with hard packed dirt.
Difficulty Easy terrain
Required Vehicle You can use a 2 wheel drive for most of the trip and get to the caves.High clearance
4×4 is needed for the last 3 miles into the cave/canyon area.
Time 2 hours
Length 18.1 miles including a trip to Diablo Dropoff.
Anza Borrego Mud Caves entrance
Mud Caves entrance

Directions to the Arroyo Tapiado Mud Caves: From Interstate 8, take Imperial Hwy., Exit 89, north through the town of Ocotillo. The highway turns west, then heads northwest, marked as S2. After 13.2 miles you will pass a brown sign on the right for Canyon Sin Nombre. Keep going another 7 miles then turn right into the Arroyo Tapiado Wash (heading north). Continue on Arroyo Tapiado Wash Road until you reach the canyon area where the caves are located. 

 Mud Cave Wall
Mud Cave Wall

Site Description: The Anza Borrego Arroyo Tapiado Mud Caves make for a fascinating afternoon of exploration. Arroyo Tapiado is Spanish for “walled wash”, as the caves have formed along the walls of the canyon’s wash. Up to this time, 22 caves and 9 slot canyons have been found. This is one of the most extensive cave systems in the world. These caves are as long as 1,000 ft and have ceilings up to 80 feet high. The caves vary in width and height and provide a fun variety of scenario. The caves were formed by erosion caused by heavy rainfall. Some of the cave openings look like nothing more than cracks in the rocks. The caves are not always obvious. You may need to do a little searching and exploring to find hidden entrances and caves that are off the beaten track. When you park and walk into Arroyo Tapiado Canyon, you will begin to see dark holes or cracks in the side of the mud walls. These are the entrances to some of the caves. Others can be found by walking into the slot canyons off of the main wash area that runs through the canyon.

Entering Anza Borrego Mud Caves
Entering Anza Borrego Mud Caves

Safety Tips:

  • Always hike with a partner
  • Bring a light source
  • If you have a hard hat or helmet, bring and use it.
  • Carry more water than you think you will need. The caves go on for miles and you may find yourself exploring for longer than you thought you would.
  • Do not walk on top of the caves, along the ridges or in areas that look like the ground could be unstable. The caves and surrounding area is made of mud that is very unstable.

TAP Note: you may not have cellphone coverage here.

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New York born to SoCal via Puerto Rico and San Francisco, partner in crime and co-founder of The Adventure Portal, Lori has over 15 years experience in partaking of adventures in the American southwest, primitive camping, hiking and exploring in her Rubi. She welcomes new challenges and is always pushing the envelope of adventure in her Jeep.