Site information:

Lake Oroville State Recreation Area, end of Bidwell Canyon Rd, far end of parking lot, Oroville

Site and plaque in recreation area, access limited by hours of operation. Fee may be required.

The plaque says the site was 120 yards west of marker, but a second marker says the original marker site was 1 mile NE from this point.  Likely near the site of the current Bidwell Bar Bridge.  So the landmark site is in the middle of the lake, meaning nothing remains today.

39.537504,-121.454953

Plaque information:

Private plaque

Plaque text:

Erected by Argonaut Parlor No. 8. Native Sons of the Golden West and Butte County Board of Supervisors to designate the site of the second county seat of Butte County

Bidwell's Bar
1853 – 1856

Site of the Court House was 120 yds. west
of this point. Marked by small monument.

Registered 8/8/1939