John Yablonski

Also known as: Yabo

Quick Info

From: USA 🇺🇸
Gender: Male
Hardest Trad (Worked): E5
Notable Partnerships
John Bachar

Californian activist and free-soloist. Credited with conceptualising Midnight Lightning and an early proponent of the bouldering sit-start.

References

[1] Portrait by Dean Fidelman, 1978 https://www.instagram.com/p/Bz_TXWJjs6R/

[2] https://www.climbing.com/people/bouldering-sit-start-john-yablonski/

Contributors
15 contributions since 26th November 2025.
3 contributions since 28th May 2021.

Quick Info

From: USA 🇺🇸
Gender: Male
Hardest Trad (Worked): E5
Notable Partnerships
John Bachar

Californian activist and free-soloist. Credited with conceptualising Midnight Lightning and an early proponent of the bouldering sit-start.

References

[1] Portrait by Dean Fidelman, 1978 https://www.instagram.com/p/Bz_TXWJjs6R/

[2] https://www.climbing.com/people/bouldering-sit-start-john-yablonski/

Contributors
15 contributions since 26th November 2025.
3 contributions since 28th May 2021.

Lists


Pics + Vids

No pics or vids yet.


Ascents

2 recorded ascents.

This timeline is missing some ascents where the date of the ascent is unknown.
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Climb Grade Style Ascent Date Suggested Grade
Climb Grade Style Ascent Date Suggested Grade
Climb Grade Style Ascent Date Suggested Grade
Leave it to Beaver E5 Solo | worked
First ascent.

Free, taking different last pitch, the usual way it is climbed. 5.11c.

Climb Grade Style Ascent Date Suggested Grade