USGS Station 11525500 • Lat 40.7247°, Long -122.8011° • Elevation California Basin
Flow is in the upper quartile (above 75th percentile) or flood stage. Powerful hydraulics and washed-out features may be present. Assess in person.
Flow is significantly elevated. Wading can be hazardous at higher percentiles, and water may be off-color. Always assess in person.
Conditions change quickly. Always verify locally and use your own judgment before entering any body of water. This data is informational only and provided as-is.
Pins show this gauge (highlighted) and up to 5 nearby USGS stations. Tap any pin or use the list to check conditions upstream or downstream.
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Guide or outfit trips near Trinity River at Lewiston, CA?
Connect directly with river runners checking water levels on station #11525500.
Verified answers based on USGS station #11525500 live telemetry and historical statistics.
The current water level (stage height) at Trinity River at Lewiston, CA (USGS #11525500) is 13.80 ft with a streamflow discharge of 310 CFS. Real-time condition is rated Flood Risk (slightly above average for this specific day of the year) and stream levels are holding steady.
Normal seasonal flow for Trinity River at Lewiston, CA is determined from decades of USGS daily-mean discharge percentiles. Flow between the 10th percentile (159 CFS) and 75th percentile (452 CFS) is classified as Normal, with the historical daily mean flow being 279 CFS for this date.
The official National Weather Service (NWS) flood stage for USGS #11525500 is 10 feet. With current water level at 13.80 ft, this station is currently at or above FLOOD STAGE. Take extreme caution.
USGS gauge #11525500 (Trinity River at Lewiston, CA) is located at latitude 40.7247°, longitude -122.8011° in California. Data is transmitted via USGS GOES satellite telemetry every 15 to 60 minutes and refreshed automatically on ClearGauge every 15 minutes.
Current flow is rated Flood Risk. DANGEROUS FLOOD STAGE: Water velocities are hazardous, debris may be in transit, and boat ramps/access points may be submerged. Avoid on-water recreation. Always inspect rapids in person, wear a USCG-approved PFD, and check weather alerts before launching.
National Water Information System (NWIS) • Automated satellite telemetry transmission every 15 to 60 minutes.
Live readings via USGS satellite telemetry, updated every 15–60 minutes. Low / Normal / High verdicts are based on the 10th and 75th percentile discharge thresholds from the USGS Daily Statistics Service (decades of approved daily-mean data). Flood Risk uses the NWS published flood stage where available. Full methodology →
River Safety Notice
River conditions can change abruptly due to upstream reservoir releases, sudden mountain thunderstorms, flash flooding, and seasonal snowmelt surges. Always scout rapids prior to commitment, wear an approved USCG Type III/V Personal Flotation Device (PFD), carry appropriate rescue gear, and check local emergency management bulletins before launching.
