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Bouldering’s Toughest Problem? Adam Ondra Eyes First-Ever V18

This video showcases Adam Ondra flashing several boulders in the V13 to V14 range in the 'Font,' but the highlight is footage of him on a V18 project.

Written by Seiji Ishii Apr 15, 2025 3:02 p.m. ET

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Adam Ondra is one of Earth’s most prolific rock climbers, and Fontainebleau is one of the most famous bouldering areas. Ondra progresses through a circuit of difficult boulder problems, flashing over half of them.

Ondra completes his tour of the iconic French forest by working on Imothep Assis, which has a predicted and yet-to-be-established grade of V18.

You can skip to 13:35 in “Boulder Tour de Fontainebleau” to witness Ondra throwing himself on the V18 project.

Seiji Ishii

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Seiji Ishii is the Climbing, Cycling, Fitness, Travel, and Powersports editor at GearJunkie.

For 20+ years, he has been writing about cycling, climbing, outdoor endeavors, motorsports, and the gear and training for those pursuits. Ishii has trained elite and professional endurance, action, and powersports athletes for 30 years.

Before GearJunkie, Ishii was a freelance contributor to print and web publications related to his interests and professional experiences. He continues to pursue climbing and cycling objectives seriously.