BIG ROCK C NR VALYERMO CA

Name: BIG ROCK C NR VALYERMO CA fish species records
Keywords: Western Mosquitofish

BIG ROCK CREEK CA USGS

BIG ROCK C NR VALYERMO CA (10263500) is a real-time streamflow monitoring station on the BIG ROCK CREEK in CA, operated by the U.S. Geological Survey. Riverbot tracks its streamflow and alerts anglers the moment flow and temperature hit their fishing window. One fish species is associated with this station in public fish records.

USGS site number: 10263500
Operated by: U.S. Geological Survey
State: CA
Coordinates: 34.4208, -117.8395

Live conditions & history

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Fishing regulations

CA state-wide default default

Default area rules for fish in the public records above. A grey row means the release has no canonical regulation match for that species.

CA state-wide default default only. Water-specific, national-park, sanctuary, licence, and in-season exceptions may apply.

American Shad Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  25
  
  Gear
  May be taken only by angling
  
  Notes
  CCR Title 14 §5.65
  
  Official rule · retrieved Aug 3, 2026
Black Bass (Largemouth and Smallmouth) Open · Harvest allowed within limits Open all year Details Close
- Open all year
  
  Daily limit
  5
  
  Notes
  CCR Title 14 §5.00(a)(2); Rivers, streams, canals and private ponds
  
  Official rule · retrieved Aug 3, 2026
Brook Trout Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  10
  
  Size rule
  <10"
  
  Notes
  CCR Title 14 §5.84; In addition to statewide trout limits (§5.84(d))
  
  Official rule · retrieved Aug 3, 2026
Catfish and Bullheads Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  no limit
  
  Notes
  CCR Title 14 §5.15
  
  Official rule · retrieved Aug 3, 2026
Lamprey Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  5
  
  Gear
  May be taken only by hand, hook, spear, bow and arrow, or dip net
  
  Notes
  CCR Title 14 §5.40
  
  Official rule · retrieved Aug 3, 2026
Landlocked Salmon Open · Harvest status unknown Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Notes
  CCR Title 14 §5.41
  
  Official rule · retrieved Aug 3, 2026
Striped Bass Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  2
  
  Size rule
  18" minimum
  
  Notes
  CCR Title 14 §5.75
  
  Official rule · retrieved Aug 3, 2026
Sunfish and Crappie Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  no limit
  
  Notes
  CCR Title 14 §5.82
  
  Official rule · retrieved Aug 3, 2026
Tilapia Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  no limit
  
  Notes
  CCR Title 14 §5.83
  
  Official rule · retrieved Aug 3, 2026
Trout (all species combined) Open · Harvest allowed within limits Apr 25 – Nov 15; Nov 16 – Dec 31; Jan 1 – Apr 24 Details Close
- Apr 25 – Nov 15
  
  Daily limit
  5
  
  Notes
  CCR Title 14 §5.85(a)(2); Streams, rivers and canals
  
  Official rule · retrieved Aug 3, 2026
White Bass Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  no limit
  
  Gear
  Must be killed immediately by removing the head or cutting the gills
  
  Notes
  CCR Title 14 §5.90
  
  Official rule · retrieved Aug 3, 2026
Yellow Perch Open · Harvest allowed within limits Jan 1 – Dec 31 Details Close
- Jan 1 – Dec 31
  
  Daily limit
  no limit
  
  Notes
  CCR Title 14 §5.91
  
  Official rule · retrieved Aug 3, 2026
Mountain Whitefish No season data Details Close
- Period not confirmed
  
  Daily limit
  5
  
  Notes
  CCR Title 14 §5.50; Open only when trout may be taken in that water
  
  Official rule · retrieved Aug 3, 2026
Northern Pike No season data Details Close
- Period not confirmed
  
  Gear
  Must be killed immediately; notify CDFW CalTip within 24 hours
  
  Notes
  CCR Title 14 §5.51; Mandatory kill — no release permitted
  
  Official rule · retrieved Aug 3, 2026

Effective Jan 1, 2026 – Sep 14, 2027 · evaluated for 2026-09-10 in America/Los_Angeles

Regulations shown are for reference only and may not reflect in-season changes. Always verify current regulations with the California Freshwater Sport Fishing Regulations (CDFW) before fishing.

Fish recorded near this station

Expected in this watershed

Big Rock C Nr Valyermo CA lies within HUC8 watershed 18090206. USGS coarse native range maps (derived from GBIF) indicate 1 fish species are expected to occur in this watershed.

Species include: western mosquitofish (Gambusia affinis).

Western Mosquitofish Gambusia affinis

Where these records come from

Evidence: Expected in this watershed; Range maps place these species in this watershed; no local survey has confirmed them at this station.
Records: 1 species; from 1 individual record
Observed: No observation dates recorded

Sources

Coarse Range Maps for Fish Species in the Conterminous United States using HUC8s — 1 record