Welcome from the Hardin KOA!

We are the brand new owners and are excited for our first year in beautiful Montana! We are now open all year!!!!
Office # (406) 665-1635.
Office hours:10 am to 6 pm MST
After hours # 971-322-3239

The Hardin KOA is halfway between Yellowstone National Park and Mt. Rushmore. Come and stay with us and enjoy all that our area has to offer. You'll be glad you did!

Jon & Kristy Mastin

Campground Amenities

  • 50 Max Amp
  • 80' Max Length
  • Wi-Fi
  • Pool (5/29 - 9/4)
  • Propane ($)
  • Firewood ($)
  • Pavilion
  • Dog Park
More About Amenities

Ways to Stay

KOA Journey

KOA Journey Campgrounds

KOA Journey campgrounds are the perfect oases after a day on the road. Whether it’s along the way or a quick getaway, they’ve got you covered. Located near the highways and byways of North America with long Pull-thru RV Sites, they deliver convenience to the traveling camper. Pull in, ease back and take a load off.

KOA Journeys Feature:

  • Pull-through RV Sites with 50-amp service
  • Premium Tent Sites
  • Well lit after hours check-in service

Latest Hot Deal

KOA Rewards Appreciation Weekend

KOA Rewards Appreciation Weekend Photo

WHEN: September 6-7, 2024

WHAT: KOA Rewards holders stay as a paying guest on Friday, September 6th at any participating KOA campground and get Saturday, September 7th for FREE*.

WHY: KOA Rewards Appreciation Weekend is designed exclusively for KOA Rewards holders to say thanks for your loyalty and for trusting your camping memories to us. On this late-summer weekend, we gather to celebrate friends, family and fun in the great outdoors we all adore.

* Only at participating KOA locations. Applies to one site per a KOA Rewards account, for two consecutive nights at the same KOA. Sites may be limited. KOA Rewards discount does apply but not valid with other discounts.

Book This Hot Deal

KOA Blog: Latest Stories

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    Recently, Randy Howell, a Kampgrounds of America, Inc. employee, tested the functionality of the GRIT Freedom Chair at two campground locations. Designed by MIT engineers, the GRIT Freedom Chair is a mix between a manual wheelchair and a mountain bike. This unique all-terrain wheelchair helps individuals live more active lives as they explore, connecting a great number of […]

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Local Area

Yellowtail Dam

The Yellowtail Dam is within an hours drive away. Beautiful scenery and wild animals can be seen along the way. Big Horn Canyon is a site to see!!! Don't miss the visitor center next to the Yellowtail Dam with all the information about the area. You can even drive to the marina and walk into the waters of the lake of Big Horn Canyon.  Check the internet for the latest update.


Little Bighorn National Monument ("Custer's Last Stand")

During June the Reenactment of The Battle of Little Big Horn is and you can meet the actors after the show. Some actors stay right here at the Hardin KOA. How fun is that? Custer visited and had ice cream at our ice cream social.


Pompey's Pillar

Pompey's Pillar is less than 45 minutes away. Pompey's Pillar is a National Monument that rises 150 feet from a 2 acre base on the banks of the Yellowstone River. Captain William Clark of the Lewis and Clark Expedition, arrived at Pompey's Pillar on July 25, 1806, on his return trip from the Pacific. Clark marked his visit by engraving his name and date of his arrival. Clark named this rock Pompey's Tower and it was renamed Pompey's Pillar in 1814 when the Lewis and Clark journals were published.


The Farmer's Daughter General Store

Home Decor. Antiques, Gifts, Souvenirs, Scrapbooking, Boutique, and Soda Fountain.  Owner Landa Uffelman.
She is located downtown Hardin.  206 N. Center Ave.  406 665 2078.
The store is so unique and a big positive addition to Hardin.  It is in the original structure of the Fort Custer General Store, owned by her Grandmother and Grandfather.  Harvey and Charlene Warren.
Don't forget to buy Papa Harvey's seasoning.  I also sell it in my store here at Hardin KOA.


Campground Awards and Programs