Pickaxe Mountain is the informal name for Kuh-e Kolang Gaz La, a heavily fortified underground complex about 2 kilometres from Iran's Natanz uranium-enrichment site. Donald Trump warned that the United States could strike it after saying Washington had detected fresh activity there. The central concern is that Iran could use the deep tunnels for centrifuge work, uranium storage or future enrichment, but no international inspector has verified what is currently inside.
What Is Pickaxe Mountain?
Pickaxe Mountain is not a conventional military base visible on the surface. It is a mountain south of Natanz in central Iran that contains two deeply buried tunnel complexes. Its Persian geographical name is Kuh-e Kolang Gaz La, which is commonly translated or shortened in English reports as Pickaxe Mountain.
The site lies around 220 kilometres south of Tehran and roughly 2 kilometres from the Natanz nuclear complex. Construction reportedly began in late 2020 after an above-ground centrifuge assembly building at Natanz was damaged. Iran described the new underground halls as a replacement assembly facility.
Satellite imagery has shown tunnel entrances, access roads, security measures and continuing construction. Images can reveal external changes, but they cannot prove what equipment, uranium or activities exist inside the mountain.
What Did Trump Say About Pickaxe Mountain?
Speaking at a Republican convention in Dallas on September 9, 2026, Trump said the United States had noticed “a little activity” at Pickaxe Mountain. He advised Iran “not to get cute” and warned that the US would hit Iran hard if the activity continued.
The statement did not identify the detected activity or disclose the intelligence behind the claim. It also did not confirm that Trump had ordered an attack. Reuters reported that he had been threatening possible strikes against the site since at least mid-July.
Why Does Trump Want to Attack Pickaxe Mountain?
Trump has identified weakening Iran's nuclear capabilities as one of his war objectives. Pickaxe Mountain attracts attention because of its location beside Natanz, its connection to centrifuge assembly and the protection offered by its deeply buried tunnels.
Centrifuges spin uranium gas at high speed to increase the concentration of uranium-235. Low levels can support civilian nuclear power. Much higher enrichment levels shorten the technical distance to weapons-grade material. Iran insists that its nuclear programme is peaceful and says it does not seek a nuclear weapon.
The United States and Israel fear that Iran could move sensitive equipment or material into a facility that is harder to monitor and attack. Reports have cited claims that centrifuges may have been moved into Pickaxe Mountain. However, the International Atomic Energy Agency has not independently confirmed those claims.
Is Pickaxe Mountain a Confirmed Nuclear Enrichment Site?
No public evidence confirms that uranium enrichment is currently taking place inside Pickaxe Mountain. The strongest verified description is that it is a fortified, centrifuge-related underground site under construction near Natanz.
Iran has said the site is not being used for nuclear activity. Outside analysts have suggested several possible purposes, including assembling centrifuges, storing equipment, protecting enriched uranium or preparing a future enrichment facility. These remain assessments, not verified facts.
This distinction matters. A tunnel complex beside a nuclear facility creates concern, but location and construction alone do not prove an active weapons programme.
Why Is the Site Difficult to Monitor?
International monitoring of Iran's nuclear programme has been disrupted by war and repeated attacks on nuclear sites. The IAEA has not regained full access to affected facilities and says it cannot verify the status of Iran's enriched-uranium inventory.
The IAEA board reported Iran to the United Nations Security Council on September 9 over a separate long-running investigation into uranium traces at undeclared sites. Iran rejected the action as political and said continuing military operations made inspections unsafe or impossible.
The lack of access creates an intelligence gap. Governments can monitor vehicles, construction, power infrastructure and tunnel entrances from satellites, but they cannot establish the full contents of chambers buried under a mountain.
Why Would an Attack Be Difficult?
The mountain itself protects the tunnels with a thick layer of rock. Analysts believe the complex may be deeper than some of Iran's existing underground nuclear sites. That could limit the effect of conventional bombs, including powerful bunker-penetrating weapons.
An attacker could target entrances, ventilation systems, electricity supplies and access roads. Such strikes might block or disrupt the facility without destroying every underground chamber. The United States has not publicly disclosed an operational plan for Pickaxe Mountain.
A strike would also carry major risks. It could widen the conflict, trigger Iranian retaliation against US forces or regional allies, disrupt Gulf shipping and push oil prices higher. If nuclear material were present, planners would also need to consider possible contamination, although there is no verified evidence that such material is stored there.
How Is Pickaxe Mountain Different From Natanz?
Natanz is an established and publicly known uranium-enrichment complex with multiple facilities. Pickaxe Mountain is a separate underground construction site nearby. Its reported original purpose was to replace a centrifuge assembly facility damaged at Natanz.
Natanz has faced several attacks and suffered major damage. Reuters reported that Pickaxe Mountain was not struck during the previous rounds of attacks referenced in its September 10 report. This has increased its strategic importance as one of Iran's most protected nuclear-related locations.
Could Trump Order an Attack Soon?
Trump's warning shows that the site is under active US scrutiny, but it does not provide a timetable or confirm a military decision. His language may be intended to deter Iran, pressure Tehran into negotiations or prepare public opinion for possible action.
The next signals to watch are verified satellite changes, IAEA access, US military movements, official Iranian responses and any announcement from the White House or Pentagon. Social-media claims about an attack should not be treated as confirmed unless supported by official statements and independent reporting.
Pickaxe Mountain FAQs
Where is Pickaxe Mountain?
It is in central Iran, about 2 kilometres from the Natanz nuclear complex and roughly 220 kilometres south of Tehran.
What is inside Pickaxe Mountain?
The site contains two deeply buried tunnel complexes. Its exact contents are not independently verified. It has been linked to centrifuge assembly, while analysts have raised other possible nuclear-related uses.
Has the United States attacked Pickaxe Mountain?
Reuters reported on September 10 that the tunnel facility had not been targeted in the earlier wars and strikes it described. Trump's latest statement was a threat, not confirmation of a completed attack.
Does Iran have nuclear weapons?
Reuters reported that Iran does not have nuclear weapons. Iran says its enrichment programme serves peaceful purposes. Western governments remain concerned about its enrichment capacity and limited international access.
Sources include Reuters, Associated Press and the Financial Express.