Silence | 9c Sport route at Flatanger Cave

Norway / Trøndelag / Flatanger kommune / Flatanger

Also known as Project Hard. Grade breakdown: 8b G 8C M 8B B 7C+ G 7B.

Silence was established by Adam Ondra in 2017. It was the first route to be graded 9c and is still a contender for the hardest sport climb in the world. Bolted by Ondra and originally dubbed Project Hard, it features a notoriously strange boulder problem crux with feet-first jamming through a slopey crack. Ondra rated this section alone 8C, whilst Will Bosi thought 8C+ was more appropriate.

Bosi and Stefano Ghisolfi have put serious time into trying to repeat the route, with both climbers linking the crux section.

Contributors
44 contributions since 16th February 2021.
14 contributions since 17th March 2026.
TdG
5 contributions since 8th July 2026.
1 contribution since 18th June 2026.

Lists


Pics + Vids

No pics or vids yet.


Ascents

1 successful ascent and 3 unsuccessful attempts recorded.

Climber Style Ascent Date Suggested Grade
First ascent.

The first 9c in the world and a new benchmark in sport climbing. Adam spent a lot of time training specifically for the route, going as far as to strengthen his calves so he could get a better rest out of the kneebars.

References

[1] Send Film https://www.youtube.com/watch?v=ZRTNHDd0gL8

[2] Photo by Keith Sharples https://www.instagram.com/p/C8fK3MPB7eH/?img_index=1

Pete had a little play on the crack section to see if he could work out a sequence.

References

[1] https://www.youtube.com/watch?v=fQWHvDvtMFs

Suggested grade breakdown: 8b+ G 6C M 8C+ M 8A+ B 7C+ G 6B.

Around 20 sessions just to link the crux boulder. [5]

References

[1] Live Q&A https://www.youtube.com/watch?v=BNAfAujGczo

[2] Footage from Will's first trip in 2025 https://www.youtube.com/watch?v=ujb7YRfE-7k

[3] Will found new beta for the crux in his second trip https://www.instagram.com/reel/DYM9-ezKidJ/

[4] Linking the crux sequence for the first time https://www.youtube.com/shorts/LMIqR4A_eHs

[5] https://youtu.be/41KxMZWxx8g?is=tclFz_p5ZyLe_Bkn

References

[1] Podcast with Alex Megos https://www.youtube.com/watch?v=_7DLZ0wAhwU

[2] 5 video YouTube playlist of his process (2022): https://www.youtube.com/playlist?list=PLfD18zMI-Pk8iXcqbVtq2S1YPc9BvLJe-

[3] Progress update (2024) https://www.youtube.com/watch?v=NCmfytvG6n8