Big Lost River
Idaho. Streamflow and water-temperature readings from USGS gauges. Running 399 cfs as of Aug 1, 2026, 5:45 PM UTC.
Latest Reading
399
cubic feet / second
9
USGS gauges
Flow measured Aug 1, 2026, 5:45 PM UTC at gauge 13127000. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.
USGS Gauges on Big Lost River
| Gauge | Station | Water temp? |
|---|---|---|
| 13120500 | BIG LOST RIVER AT HOWELL RANCH NR CHILLY ID | — |
| 13127000 | BIG LOST RIVER BL MACKAY RES NR MACKAY ID | — |
| 13130300 | BIG LOST RIVER NR LESLIE ID | — |
| 13132100 | BIG LOST RIVER BELOW MOORE DIV NR MOORE ID | — |
| 13132373 | BIG LOST RIVER AT ARCO AT SUNSET ROAD ID | — |
| 13132500 | BIG LOST RIVER NR ARCO ID | — |
| 13132520 | BIG LOST RIVER BL INL DIV NEAR ARCO ID | — |
| 13132535 | BIG LOST R AT LINCOLN BLVD BRIDGE NR ATOMIC CITY | — |
| 13132565 | BIG LOST RIVER AB BIG LOST RIVER SINKS NR HOWE ID | — |
Conditions: USGS NWIS (public domain).