As United States and Iranian forces trade blows in an escalating conflict that has already stretched through multiple nights of strikes in July 2026, one obscure name has repeatedly surfaced in President Donald Trump’s public remarks: Pickaxe Mountain. The site, known in Persian as Kuh-e Kolang Gaz La, has become a focal point of American threats and intelligence scrutiny. Trump has described it as a priority target, vowing that U.S. forces will hit the area “pretty soon, and very heavily.” Understanding what Pickaxe Mountain actually is requires looking past the dramatic rhetoric to its history, location, declared purpose, and the reasons it now sits at the center of nuclear non-proliferation concerns.
Pickaxe Mountain is an underground complex carved into a mountain roughly one to two kilometers south of Iran’s main Natanz uranium enrichment facility in central Iran. The site lies approximately 220 kilometers (140 miles) south of Tehran in the Zagros mountain range. The mountain itself rises nearly 5,300 feet above sea level. Analysts estimate the main underground halls sit more than 100 meters (about 328 feet) beneath the surface, and in some assessments deeper still. This depth, combined with hardened concrete entrances and an expanded security perimeter, makes the facility one of the most protected elements of Iran’s remaining nuclear infrastructure.
Construction began in the fall of 2020. At the time, Iran publicly stated that the new underground halls would replace an above-ground advanced centrifuge assembly workshop at Natanz that had been damaged in explosions earlier that year. Iranian officials described the project as a “more modern, spacious, and comprehensive” facility for the production and assembly of advanced centrifuges—the high-speed machines used to enrich uranium. The Atomic Energy Organization of Iran declared the site to the International Atomic Energy Agency (IAEA) for this purpose. In principle, assembling centrifuges is not the same as operating enrichment cascades, but the ability to manufacture thousands of advanced machines each year would significantly enhance Iran’s capacity to rebuild or expand any enrichment program.
Satellite imagery analyzed by the Institute for Science and International Security and other monitoring groups shows a large tunnel complex with multiple entrances, spoil piles from excavation, and ongoing hardening of access points. A smaller, older tunnel complex nearby, dating to around 2007, was also expanded and sealed after the June 2025 fighting. Construction activity at Pickaxe Mountain accelerated after Israeli and U.S. strikes in the 12-day war of June 2025 and again during the wider conflict that intensified in early 2026. Those earlier campaigns heavily damaged the main Natanz enrichment halls, the Fordow site, and facilities at Isfahan. Pickaxe Mountain itself was not targeted in either round of attacks.
As of mid-July 2026, independent assessments indicate the facility is not yet fully operational. Vehicle movements, continued excavation, and work on tunnel portals remain visible in commercial satellite images. Yet the absence of IAEA inspectors at the site has fueled concern. Inspectors have been largely barred from many Iranian nuclear locations since the current phase of fighting began, leaving the international community without on-the-ground verification of what equipment or materials may have been moved inside.
Israeli intelligence assessments, reported by multiple outlets and reviewed by U.S. officials, claim that after the 2025 strikes Iran transferred thousands of advanced centrifuges into the tunnels at Pickaxe Mountain. Some reports go further, suggesting portions of Iran’s stockpile of highly enriched uranium—material already near weapons-grade—may also have been relocated there for safekeeping. Trump has publicly treated these claims with caution, stating that the United States tracks nuclear material carefully and does not have independent confirmation of centrifuge movements “on record.” He has nevertheless repeatedly named the site as a target. In interviews and remarks to reporters in July 2026, he declared that U.S. forces are watching the mountain closely and intend to strike it.
The technical challenge of attacking Pickaxe Mountain is considerable. Conventional bunker-buster munitions, including the U.S. Massive Ordnance Penetrator, are designed for deeply buried targets, yet the combination of rock overburden, multiple redundant entrances, and potential internal compartmentalization raises questions about how thoroughly any single strike could disable the complex. Analysts note that collapsing tunnel portals, cutting power and ventilation lines, or destroying surface support infrastructure could still disrupt operations and force visible repair efforts that satellites would detect. Ground or special-operations approaches face their own difficulties given the remote, elevated, and heavily secured location. Iranian officials have described the site as among the most fortified in the world and have warned that any attack would expand the war.
The broader strategic context is a nuclear program that has proven resilient under pressure. Iran continues to insist its nuclear activities are exclusively peaceful and aimed at energy production and scientific development. Western governments and Israel argue that the combination of high enrichment levels, advanced centrifuge manufacturing capacity, and hardened underground sites creates an unacceptable pathway toward a weapons option. The fact that Pickaxe Mountain was spared in previous campaigns while surface and shallower facilities were hit has only increased its relative importance. With construction still underway and intelligence reports of equipment transfers circulating, the site has become a symbol of Iran’s ability to adapt and disperse critical capabilities.
Oil markets have already reacted to the wider fighting, with prices climbing past $90 a barrel on fears of disruption to shipping through the Strait of Hormuz. U.S. Central Command has reported continuous strikes on Iranian military and logistics targets, while Iranian forces have activated air defenses over Tehran and other cities. In this environment, Trump’s focus on Pickaxe Mountain signals an intent to target the industrial heart of any potential nuclear reconstitution rather than solely the already-damaged enrichment halls.
Whether a strike on the mountain can meaningfully set back Iran’s long-term nuclear ambitions remains an open question among experts. Some argue that destroying or sealing the centrifuge assembly halls would eliminate a key reconstitution pathway. Others note that Iran has developed domestic manufacturing capacity across multiple locations and that material and components could be dispersed or rebuilt elsewhere. The absence of IAEA access compounds the uncertainty. Without inspectors on the ground, claims about what is—or is not—inside the mountain cannot be independently verified.
Pickaxe Mountain therefore sits at the intersection of technical nuclear capability, geographic fortification, and high-stakes military signaling. Born as a response to earlier sabotage and attacks, it has evolved into one of the most closely watched sites in the region. As U.S. officials continue to weigh options and Iranian authorities harden their positions, the mountain under the Zagros range has become far more than a construction project. It is now a test of how far each side is prepared to go in the contest over Iran’s nuclear future.
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