Donald Trump just put a target on a piece of rock in central Iran. Speaking on The Hugh Hewitt Show, the US president bluntly declared that the military plans to take out an underground facility known as Pickaxe Mountain.
If you haven't heard of this place before, you're not alone. The site barely registered in mainstream military analysis until recently. Located about a mile south of the main Natanz enrichment complex in the Zagros range, the Iranian site known locally as Kuh-e Kolang Gaz La is turning into the ultimate geopolitical flashpoint.
Here's the problem. Striking it isn't like bombing a conventional airfield or a surface lab. Pickaxe Mountain sits under hundreds of feet of solid granite, making it one of the deepest military digs on Earth.
What Pickaxe Mountain Actually Is
Iran started digging into the mountain back in late 2020. The project kicked off right after an explosion destroyed an above-ground centrifuge manufacturing shop at Natanz. At the time, Iranian officials claimed the new tunnel network was built simply to replace that assembly plant in a safer location.
Intelligence agencies and nuclear watchdog groups saw a completely different picture.
The sheer scale of the excavation told a story that didn't match Tehran's official statement. Satellite images captured massive piles of excavated spoil coming out of the mountain. Tunnel entrances were cut deep into the rock face. Rather than a modest workshop for putting centrifuges together, the site looked suspiciously like a full-blown underground nuclear fortress.
Experts at the Washington-based Institute for Science and International Security tracked the progress closely. By 2021, analysts warned that the mountain could host either a covert uranium enrichment hall or a hardened storage vault for Iran's stockpile of 60% highly enriched uranium.
Why Bunker Busters Might Not Work
When the US bombed Iran's primary nuclear installations at Natanz, Fordow, and Isfahan in June 2025, Pickaxe Mountain was left off the hit list. Why? Because the site wasn't fully operational yet, and hitting it presented a massive engineering headache for military planners.
Fordow was already famous for being buried under roughly 200 feet of rock. Pickaxe Mountain goes even deeper. Estimates suggest the underground halls sit between 260 and 330 feet beneath solid stone.
That depth pushes the limits of American ordnance:
- The US military's premier bunker-busting weapon, the 30,000-pound GBU-57 Massive Ordnance Penetrator (MOP), is rated to penetrate around 200 feet of earth and rock before detonating.
- Concrete reinforcement at the tunnel portals adds another layer of defense against direct air strikes.
- Multiple angled entrance shafts mean a bomb hitting a tunnel mouth might not destroy the vital halls deeper inside.
Because standard air strikes might only seal the doors rather than crush what lies inside, taking out Pickaxe Mountain requires either repeated, precise strikes on the exact same spot or boots-on-the-ground sabotage.
Recent Satellite Evidence Shows Work Hasn't Stopped
Despite diplomatic efforts and temporary ceasefires, construction workers at Kuh-e Kolang haven't taken a break.
Satellite imagery from late June 2026 reveals ongoing heavy vehicle traffic around the western tunnel portals. Crews appear to be actively reinforcing the entrances, building expanded perimeter walls, and moving heavy machinery into the mountain.
That continuous activity directly complicates the fragile Memorandum of Understanding signed between Washington and Tehran. While the agreement intended to freeze nuclear expansion, the ongoing excavation shows Iran is securing its strategic hedge against future strikes.
The International Atomic Energy Agency (IAEA) has never stepped foot inside the facility. Tehran hasn't declared it as an active enrichment hall under its safeguards agreement, leaving Western analysts guessing about what equipment rests behind those blast doors.
What Happens Next
If the White House decides to follow through on its threat, the military math gets complicated quickly.
Watching satellite feeds won't tell you if centrifuges are already spinning inside or if the halls are still empty concrete shells. Striking a site with unknown contents carries huge operational risk, but leaving a potentially invulnerable enrichment plant untouched carries an equally high political cost.
To track how this standoff unfolds over the coming weeks, keep your eye on three key indicators:
- Watch for IAEA emergency briefings regarding inspector access to undeclared sites near Natanz.
- Monitor satellite imagery reports from independent research groups like the Institute for Science and International Security for changes in heavy transport around the tunnel portals.
- Pay attention to US Central Command operational updates for shifts in tactical bomber deployments to the region.
