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County Route Shield

County Sign Route A21

[Click here for a key to the symbols used. Some county routes were constructed with federal funds. These routes are indicated as FAP (Federal Aid Primary), FAU (Federal Aid Urban), or FAS (Federal Aid Secondary). If no funding source is shown, no federal funds were used. Note that while some segments seem to have the same attributes, they may differ in the county-local road number assigned to the segment, or in the Caltrans Map Sheet number.]

Routing Routing

  1. Cty Rte A21Mooney Road from Route 147 to the Plumas county line (12.85 mi) [Lassen County]. According to the map, the route from Route 147 is 3rd Street, Ash Street, and then Mooney Road.

  2. Mooney Road from the Plumas county line to the Plumas county line (1.20 mi) [Plumas County]

  3. Mooney Road from the Plumas county line to Route 44 (8.55 mi) [Lassen County]

  4. Google Maps shows County Sign Route A21 continuing from Route 44 to Champs Flat Road/Forest Rte 33N02, but that is unconfirmed.

History and Signage Information History and Signage Information

This route was defined in 1963. This is likely the original portion of LRN 183, defined in 1933.

Status Status

Total mileage: 22.60 mi. The Caltrans printout shows segment 2 as being in Lassen County, but according to the Thomas Bros. atlas, it is a small segment that cuts the corner of Plumas County (so it was likely a keypunch error).

Acronyms and Explanations:

Back Arrow CR A20 Forward Arrow CR A22

© 1996-2020 Daniel P. Faigin.
Maintained by: Daniel P. Faigin <>.