Minidoka National Historic Site

Park Historic internment site commemorating Japanese-American WWII incarceration

Eastern Idaho’s Minidoka National Historic Site preserves a WWII Japanese American incarceration camp with foundations, interpretive exhibits and memorials; visitors come for civil‑rights history and site interpretation.

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Minidoka National Historic Site commemorates the Minidoka Relocation Center, one of the sites where Japanese Americans were incarcerated during World War II; it preserves and interprets the camp’s history and physical remains. The unit recognises the forced removal, detention and challenges faced by those incarcerated there between 1942 and 1945.

Visitors encounter exposed building foundations, a memorial cemetery and interpretive panels that describe camp life, administration and the broader wartime policies that produced the relocation program. The site focuses on education and commemoration rather than full structural reconstruction.

The camp was established in 1942 by the U.S. government as part of the wartime removal of Japanese Americans from the West Coast and remained in operation until 1945. During that period thousands of people were interned at Minidoka and associated facilities.

The historic site lies in south-central Idaho near the towns of Jerome and Rupert on the Snake River Plain and is administered by the National Park Service as a unit dedicated to interpretation and preservation.

  • Scale and remains: Approximately 9,000 people were confined at the Minidoka Relocation Center during its operation; the site preserves foundations, a cemetery and interpretive exhibits that explain the history of Japanese American incarceration.
Minidoka National Historic Site
42.6810, -114.2474

How to Get to Minidoka National Historic Site #

Minidoka is near Jerome in south-central Idaho, roughly 40-60 minutes from Twin Falls by car. The site is best reached by private vehicle; there is limited public transit in the region. From Twin Falls, take US-93 south and local roads toward Rupert/Jerome and follow signs to the historic site.

Tips for Visiting Minidoka National Historic Site #

  • Check seasonal opening times for visitor centers and any ranger-led programs-some events occur only in summer.
  • Combine a visit with nearby historic sites and recreational paths along the Snake River for broader context.
  • Pack insect repellent in summer-the river plains and marshes attract mosquitoes.

Best Time to Visit Minidoka National Historic Site #

Best in summer for ranger programs and accessible facilities; autumn offers quieter conditions for reflection and photography.

Summer
June-August · 10-28°C
Warm days for ranger programs, historic exhibits and accessible roads into the preserve.
Autumn
September-October · 0-18°C
Leaves turn and crowds diminish; mornings can be chilly but wildlife is active.
Winter
November-March · -10-5°C
Snowy and quiet; some roads and visitor services close but the landscape is stark and beautiful for those prepared.

Weather & Climate near Minidoka National Historic Site #

Climate

Minidoka National Historic Site's climate is classified as Cold Semi-Arid - Cold Semi-Arid climate with warm summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -8°C to 32°C. Semi-arid with limited rainfall.

Temperature & Rainfall
Temperature Range
32°
Warmest Month
-8°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of 1°C and lows of -8°C. The wettest month with 36 mm of rain.

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-8°

Weather

36 mm
Rainfall
3.4 m/s
Wind
Light Breeze

February

February is freezing with highs of 5°C and lows of -6°C. Light rainfall.

Comfort

Feels Like Freezing
C
Temperature
-6°

Weather

25 mm
Rainfall
3.6 m/s
Wind
Light Breeze

March

March is cold with highs of 11°C and lows of -2°C. Light rainfall.

Comfort

Feels Like Cold
C
Temperature
-2° 11°

Weather

28 mm
Rainfall
3.9 m/s
Wind
Light Breeze

April

April is cold with highs of 16°C and lows of 1°C. Light rainfall.

Comfort

Feels Like Cold
C
Temperature
16°

Weather

20 mm
Rainfall
4.2 m/s
Wind
Light Breeze

May

May is cool with highs of 21°C and lows of 5°C. Light rainfall.

Comfort

13°
Feels Like Cool
13°C
Temperature
21°

Weather

28 mm
Rainfall
3.9 m/s
Wind
Light Breeze

June

June is cool with highs of 26°C and lows of 9°C. Light rainfall.

Comfort

18°
Feels Like Cool
18°C
Temperature
26°

Weather

19 mm
Rainfall
3.7 m/s
Wind
Light Breeze

July

July is the warmest month with highs of 32°C and lows of 12°C. The driest month with just 6 mm.

Comfort

22°
Feels Like Mild
22°C
Temperature
12° 32°

Weather

6 mm
Rainfall
3.4 m/s
Wind
Light Breeze

August

August is mild with highs of 31°C and lows of 11°C. Almost no rain.

Comfort

21°
Feels Like Mild
21°C
Temperature
11° 31°

Weather

8 mm
Rainfall
3.2 m/s
Wind
Light Breeze

September

September is cool with highs of 25°C and lows of 6°C. Light rainfall.

Comfort

16°
Feels Like Cool
16°C
Temperature
25°

Weather

15 mm
Rainfall
3.2 m/s
Wind
Light Breeze

October

October is cold with highs of 18°C and lows of 1°C. Light rainfall.

Comfort

10°
Feels Like Cold
10°C
Temperature
18°

Weather

18 mm
Rainfall
3.3 m/s
Wind
Light Breeze

November

November is cold with highs of 8°C and lows of -4°C. Moderate rainfall (33 mm).

Comfort

Feels Like Cold
C
Temperature
-4°

Weather

33 mm
Rainfall
3.4 m/s
Wind
Light Breeze

December

December is freezing with highs of 2°C and lows of -8°C. Moderate rainfall (31 mm).

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-8°

Weather

31 mm
Rainfall
3.4 m/s
Wind
Light Breeze

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