USGS Streamgage 10344400
Little Truckee River Ab Boca Reservoir near Truckee, CA
Little Truckee River Ab Boca Reservoir near Truckee, CA is USGS streamgage 10344400 in California, monitoring river discharge in hydrologic subbasin 16050102. It sits on the Little Truckee River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 146 square miles. Discharge records at this site go back to 1904. Typical flow runs near 93.4 cfs in July and 219.5 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
Gauge details
- State
- California
- Drainage area
- 146 sq mi
- Gauge elevation
- 5,623 ft
- Subbasin (HUC-8)
- 16050102
- Coordinates
- 39.43571, -120.08434
- USGS site number
- 10344400
- Records begin
- 1904-04-14 (122 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Little Truckee River Ab Boca Reservoir near Truckee, CA. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 42.2 | 47 | 50.3 | ||
| 38 | 46.5 | 50.3 | ||
| 36.2 | 46.2 | 50.3 | ||
| 36.5 | 46.1 | 50.7 | ||
| 34 | 45.7 | 50.7 | ||
| 31.4 | 45.4 | 50.6 | ||
| 32.9 | 45.5 | 51 | ||
| 32.1 | 45.3 | 51.3 | ||
| 33.2 | 45.3 | 51.9 | ||
| 31.8 | 45.1 | 52.3 | ||
| 31.5 | 45.1 | 54 | ||
| 34.9 | 45.5 | 54.6 | ||
| 30.2 | 45.2 | 54.8 | ||
| 30.1 | 44.7 | 54.5 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 58 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 29.5 | 52 | 177.2 | |
| February | 31.3 | 70.6 | 170.7 | |
| March | 36.1 | 117.4 | 293.8 | |
| April | 45.8 | 219.5 | 709.2 | |
| May | 62.6 | 359.3 | 1,102.4 | |
| June | 35 | 184.5 | 691.3 | |
| July | 30.6 | 93.4 | 375.9 | |
| August | 27.5 | 58 | 236.7 | |
| September | 23.9 | 40.7 | 121.2 | |
| October | 26.3 | 40.1 | 141.7 | |
| November | 25.8 | 37.1 | 110.2 | |
| December | 28.3 | 43.7 | 142.2 |
All values in cubic feet per second (cfs).
Common questions
- When does Little Truckee River Ab Boca Reservoir near Truckee, CA normally run highest?
- May, on the long-term record. The median daily flow that month is about 359.3 cfs, against 37.1 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Little Truckee River Ab Boca Reservoir near Truckee, CA?
- It depends on the month. In January, half of days historically fall near 52 cfs, with the middle 80% of days between 29.5 and 177.2 cfs. The month-by-month table on this page gives the full range.
- How long has Little Truckee River Ab Boca Reservoir near Truckee, CA been measured?
- Discharge records at USGS site 10344400 begin in 1904, about 122 years, covering roughly 9,130 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Little Truckee River Ab Boca Reservoir near Truckee, CA?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- Where is Little Truckee River Ab Boca Reservoir near Truckee, CA?
- The gauge sits at 39.43571, -120.08434, in California, in hydrologic subbasin 16050102, at an elevation of about 5,623 feet, draining roughly 146 square miles.
- Can I use Little Truckee River Ab Boca Reservoir near Truckee, CA data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Upstream and downstream on the Little Truckee River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Little Truckee River in full.
- Little Truckee River Ab Boca Reservoir near Truckee, CA this page
- Little Truckee River below Boca Dam near Truckee, CA 173 sq mi