Big Lost River at Arco at Sunset Road water level

Name: Big Lost River at Arco at Sunset Road water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Big Lost River, Idaho, United States

Directions

Normal for mid-October

Water level

5.08ft Steady over the last 24 hours

Measured Oct 19, 2026, 10:45 AM MDT (29 min ago)

Flow: 0.0 cfs

History

7 days

Water level

What this means

The Big Lost River at Arco at Sunset Road is at 5.08 ft, in the normal range for mid-October.

It has barely moved over the past 24 hours.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 5 years of daily readings for this time of year. How to read levels

Floating and fishing near Big Lost River at Arco at Sunset Road

Normal flows mean predictable rapids and good access at most put-ins.

Weather at the gauge

No rain in the last 3 days.

17 Sat 64° 30° – Wind 9 mph

18 Sun 64° 34° – Wind 6 mph

19 Mon 62° 36° – Wind 7 mph

20 Tue 63° 50° 0.03 in Wind 11 mph

21 Wed 65° 47° 0.01 in Wind 13 mph

22 Thu 65° 50° 0.04 in, 69% Wind 14 mph

23 Fri 51° 41° 0.32 in, 69% Wind 16 mph

Forecast: Open-Meteo

Sunrise 07:53 AM Sunset 06:45 PM Daylight 10 hr, 52 min First quarter 61%

Map

Other gauges on the Big Lost River

Gauge	Level	Compared with normal	24 hours	Distance
Big Lost River at Howell Ranch near ChillyRiver gauge, Big Lost River	0.99 ft	Below flood stage	−0.01 ft	43 mi
Big Lost River below Mackay Reservoir near MackayRiver gauge, Big Lost River	1.65 ft	Below flood stage	−0.02 ft	26 mi
Big Lost River near LeslieRiver gauge, Big Lost River	79.0 cfs	Low	−3.3 cfs	17 mi
Big Lost River below Moore Diversion near MooreRiver gauge, Big Lost River	0.0 cfs	Low	±0	10 mi
Big Lost River near ArcoRiver gauge, Big Lost River	2.00 ft	Below flood stage	±0	4.8 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Antelope Creek near DarlingtonRiver gauge, Antelope Creek	4.62 ft	Below flood stage	±0	11 mi
Little Lost River near HoweRiver gauge, Little Lost River	2.70 ft	Below flood stage	−0.01 ft	20 mi
Little Lost River above Flood Diversion near HoweRiver gauge, Little Lost River	36.1 cfs	Low	−1.7 cfs	21 mi
Lower Cedar Creek above Divs near MackayRiver gauge, Lower Cedar Creek	10.8 cfs	Normal	±0	26 mi
Warm Springs Creek below Diversion near MackayRiver gauge, Warm Springs Creek	42.7 cfs	High	+2.5 cfs	34 mi
Little Lost River below Wet Creek near HoweRiver gauge, Little Lost River	1.13 ft	Below flood stage	−0.02 ft	35 mi

Questions and answers

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Big Lost River at Arco at Sunset Road today?

On Oct 19, 2026, 10:45 AM MDT, the water level was 5.08 ft. Steady over the last 24 hours.

Is Big Lost River at Arco at Sunset Road rising or falling?

Steady over the last 24 hours.

Is the level of Big Lost River at Arco at Sunset Road normal?

Normal for mid-October. Compared with 5 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:13132373 (Agency page)
Coordinates: 43.63819, -113.32650 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	5.08 ft	2026-10-19 16:45	Provisional
Flow	0.0 cfs	2026-10-19 16:45	Provisional

Download

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How to cite

U.S. Geological Survey: Big Lost River at Arco at Sunset Road (usgs:13132373). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/idaho/big-lost-river-at-arco-at-sunset-road

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer