Mushroom Rock, known locally as El Hongo, has long been one of the most recognizable natural forms associated with La Paz. Standing in the shallow water of Bahía Balandra, its narrow base and broad cap have appeared in countless travel photographs.
During the winter of 2005, residents discovered that the rock had toppled. Its sheltered setting protects it from much of the Sea of Cortez, but unusual wind and waves from the west may have reached the formation’s vulnerable base. The precise time and cause were not documented.
The landmark at a glance
- Local name
- El Hongo, or “the mushroom”
- Setting
- Shallow coastal water in Bahía Balandra
- Estimated mass
- Approximately 18–20 tons in contemporary accounts
- Restoration
- Completed in September 2005
A difficult site
The restoration was complicated by the landscape itself. Sharp submerged rock surrounded the formation, no road reached the point, and the shallow water made a conventional marine crane impractical. Equipment, steel and supplies therefore had to arrive by small boat.
The stone also required delicate handling. It was described as a composite formation rather than a single uniform block. A careless lift could have damaged the landmark while trying to save it.
Building the lifting frame
The crew’s solution was a steel superstructure assembled around the fallen rock. Sections of six-inch pipe were prepared in advance, carried to Balandra and welded into a cube-like frame. Its base was secured so that chain hoists, belts, ropes and cargo straps could lift and rotate the stone.
Establishing a temporary work area was essential. Power generation and welding equipment had to be floated to the site, while the crew needed drinking water and provisions for work in the late-summer heat.
Designing a durable base
The repaired support had to be strong without substantially changing the rock’s natural appearance. The approach used a stainless-steel shaft inserted into both the foundation and the stone. Smaller support rods would later reinforce the connection.
Drilling into the foundation was relatively direct. Finding the receiving angle in the fallen rock was harder: it had rotated as it fell and lay partly submerged on its side. The team had to estimate the drilling axis that would return the cap to a familiar orientation after lifting.
The lift and final placement
Ropes and cargo straps encircled the formation to distribute the load and help hold the composite stone together. Hoists connected at different points allowed the crew to raise, turn and tilt it. Accounts of the work recall tense moments as hardware shifted under the enormous load, but the lift proceeded without a reported major incident.
Once the stone was positioned over the pedestal, marine epoxy was placed around the receiving connection and the formation was lowered. Warm conditions accelerated the setting process, leaving limited time to fine-tune its attitude and rotation.
Over the following days, the crew adjusted the placement, added smaller steel supports and concealed the engineered base with matching stone and tinted mortar. The scaffold came down during the third week of September 2005. By October, the intervention was reportedly difficult to distinguish from the surrounding formation.
A symbol shaped by change
The 2005 project preserved a familiar silhouette while acknowledging the unstable geology that created it. Mushroom Rock remains a useful reminder that natural landmarks are not fixed objects: erosion continues even when people intervene to protect a beloved form.
Visitors approaching sensitive beaches and rock formations should follow current protected-area rules, avoid climbing or pushing fragile features, and leave the shoreline as they found it.
