Deepest borehole
The current deepest borehole record is 40,230 ft, held by Kola Superdeep Borehole. Last checked October 9, 2026.
40,230
ft
Kola Superdeep Borehole
- Holder
- Kola Superdeep Borehole
- Record
- 40,230 ft
- Metric
- 12.26 km
- Exact figure
- 12,262 m
- Location
- Murmansk Oblast, Russia
- Last checked
- October 9, 2026
Sources
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