CA CA - Billy Pierson, adult, car found in the Big Pine Creek area, 10 Sept 2025

[TwinkieDefense]

Oct 10, 2025 article - indicates he may have attempted to climb Temple Crag.

ETA: (I will alert the mods, as I should have noted in title the last seen date was in early August).

A month since Seattle hiker was reported missing in Southern California

Billy Pierson was last seen in early August when he split up with his hiking partner to attempt a solo climb. His car was found in the Big Pine Creek area Sept. 10.

www.king5.com

[…]

Pierson's family said he may have also traveled to North Palisades, Mt. Sill, Thunderbolt Peak or Mt. Aggasiz.

[…]

 

[GraceG]

Several articles out on him, all saying pretty much the same thing. Does appear a search has been conducted. https://www.sfgate.com/bayarea/article/missing-seattle-man-six-weeks-sierra-nevada-21061718.php

This article further details where they have searched.

Search for hiker who went missing in east California continues

Search and Rescue teams are continuing efforts to find a hiker who went missing in east California.

www.kolotv.com

In one of the photos - the knot on his climbing equipment looks like a Figure 8 with a Yosemite Finish. IMO he's no novice.