Island Park Reservoir lake and shoreline

Island Park Reservoir Water Level

Idaho

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Island Park Reservoir is currently at a water-surface elevation of 257.9 feet.

257.93 ft · Updated 2 hours ago · USACE SAW District

Current level

257.93ft

Status unavailable

A verified operating range is not available for this lake.

Since last reading

Down 0.02 ft

Previous readingSep 9257.96 ft

7-day change

Down 0.04 ft

7-day trend: Falling

4 daily readings in the last 7 days

30-day change

Down 0.04 ft

4 daily readings in the last 30 days

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Water Level History

Elevation (ft) Water-surface elevation (ft)

258 ft258 ft258 ftSep 8Sep 11

Level status

Summary updating

This comparison needs the current level and full pool. We use the live feed when present, otherwise the latest daily summary when it includes a pool comparison.

DatumVertical reference for published pool and stage elevations at this lake (from the lake catalog).
Water-surface elevation (ft)
Elevation reference
Not available
Source
USACE SAW District

Reference levels

No published reference elevations for this lake.

Watershed drought

Extreme Drought

100% of watershed in official drought (D1+).

Severity

NoneExtreme
Trend
Stable

Watershed drought conditions

Fremont County, ID

Extreme Drought

Extreme Drought. Extreme drought conditions are present.. Trend: Stable compared with last week. Official drought yes

Severity

NoneExtreme

Weekly trend

Stable

Compared with last week

Official drought

Yes

100% of the watershed is currently classified as official drought (D1+).

Expected impacts

  • Significantly reduced stream inflows
  • Lake levels may fall quickly without heavy rain
  • Dry vegetation and elevated wildfire risk
  • Water use restrictions may apply nearby

U.S. Drought Monitor · map date Sep 8, 2026. Updated weekly. droughtmonitor.unl.eduView drought map for Fremont County, ID

Daily level summary

  • Sep 10, 2026

    257.94 ft

    -0.02 ft

  • Sep 9, 2026

    257.96 ft

    -0.01 ft

  • Sep 8, 2026

    257.97 ft

    -0.01 ft

  • Sep 7, 2026

    257.98 ft

    —

Common questions about Island Park Reservoir’s water level

  • The current water level at Island Park Reservoir is 257.93 ft (updated 2 hours ago). You can track the Island Park Reservoir lake level on the interactive chart and daily history above.

  • The current 7-day trend for the Island Park Reservoir lake level is falling — falling about 0.04 ft over the past week. See the history chart above for the full picture.

  • Readings refresh when USACE SAW District publishes new gauge data — typically daily for most reservoirs. The timestamp above the chart shows when the latest observation arrived on Lake Insights.

Lake level glossary

Definitions for pool targets, datums, and how elevation readings are labeled.

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