Island Park Reservoir lake and shoreline

Island Park Reservoir Water Level

Idaho

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Island Park Reservoir

Island Park Reservoir is currently at a water-surface elevation of 258.3 feet.

258.31 ft · Updated 6 hours ago · USACE SAW District

Current level

258.31ft

Status unavailable

Since last reading

No meaningful change

Previous readingOct 24258.32 ft

7-day change

Down 0.15 ft

7-day trend: Falling

8 daily readings in the last 7 days

30-day change

Down 0.07 ft

28 daily readings in the last 30 days

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Water Level History

Current
258.31 ft
24h
0.00 ft
7d
-0.15 ft
30d
-0.07 ft

Elevation (ft) Water-surface elevation (ft)

Reference line is designed full pool.

Water Temperature

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Lake Level Context

Current lake level

Island Park Reservoir is currently 258.31 ft. The lake has fallen 0.15 ft over the past 7 days and 0.07 ft over the past 30 days.

Island Park Reservoir Level Details

Reference elevations, recent daily readings, data sources, and answers to common questions.

Conditions & Reference

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.

Surrounding county drought

Moderate Drought

58.5% of surrounding county in official drought (D1–D4).

Severity

NoneExtreme
Trend
Stable

Surrounding county drought

Fremont County, ID

Moderate Drought

Moderate Drought. The largest share of Fremont County, ID is in Moderate Drought (D1), an official USDM drought category. These figures describe the surrounding county from the lake location, not the lake itself.. Trend: Stable compared with last week. Official drought (D1–D4) yes

Severity

NoneExtreme

Weekly trend

Stable

Compared with last week

Official drought (D1–D4)

Yes

58.5% of the surrounding county is in official drought categories (D1–D4). Dominant category remains Moderate Drought.

Typical county impacts (USDM guidance)

  • Streamflows in the surrounding county may run below normal
  • Soils and vegetation can dry between rain events
  • Water managers may begin to watch supply more closely

U.S. Drought Monitor · map date Oct 20, 2026. Updated weekly. Official drought means U.S. Drought Monitor categories D1–D4 (Moderate through Exceptional). Abnormally Dry (D0) is not counted as official drought. droughtmonitor.unl.eduView drought map for Fremont County, ID

Daily level summary

DateLevelChange
Oct 25, 2026258.320
Oct 24, 2026258.320
Oct 23, 2026258.32-0.01
Oct 22, 2026258.33-0.08
Oct 21, 2026258.41-0.05
Oct 20, 2026258.46-0.01
Oct 19, 2026258.470

Common questions about Island Park Reservoir’s water level

  • The current water level at Island Park Reservoir is 258.31 ft (updated 6 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 0.15 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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