2455 Old Penitentiary Road

Boise, ID 83712 (Next to the Old Pen)

Current Hours

NOVEMBER: Saturdays 1-4. Last day for the season is Nov 21st. We will close for the season and reopen in March.

Free Admission!

Tours and other programs available.

Your  membership helps support: 

  • FREE ADMISSION to the public
  • Upkeep and maintenance of the museum
  • Youth educational programs
  • Lectures and Field Trips
  • Gold Panning and other Special Events
  • Exhibit development maintenance

As a member you will receive:

  • All members receive a 20% discount on all gift shop purchases.
  • Free admission to lectures, field trips, and special events.
  • Memberships are for either individuals or families
  • Opportunity to vote in Board elections.

Memberships are purchased on a yearly basis. You will be reminded via email when your membership approaches its renewal date.

Already a member of IMMG? You can log-in to check or renew your membership. If you joined in 2026, you may need to select “Forgot Password” to establish your password moving forward.

Interesting in gifting a membership?

  • The buyer does not need an account; no password is needed.
  • The buyer has the option to personalize the gift membership announcement message with a brief custom message. The notification is sent out as soon as the membership is purchased. The buyer is copied on the new membership email.