Welcome to the Big Timber KOA RV Park! Your basecamp for exploring south-central Montana

We are located at I-90 exit 377, on the south side frontage road (same side as the Prairie Dog Town State Park). Now booking: Deluxe Patio Sites and newly remodeled bath houses! Filled with beautiful trees and bordered by a lazy Montana creek, the Big Timber KOA is a wonderful spot to come relax and spend time with friends and family. Enjoy our heated pool, game room and jumping pillow. Stop in our general store for groceries, hot food and all your camping supplies. Stay for a few days and enjoy this beautiful part of Montana-ask our staff for suggestions or for help booking activities and tours in the area. We can accommodate rigs up to 90 feet! Our pull-through sites sell out fast, so please call for availability. No RV? Stay in a comfortable cabin or bring your tent for an old-fashioned camping experience. Nearby attractions to visit include Greycliff Mill and Cheese Cave, Yellowstone National Park, Natural Bridge Falls, the Crazy Mountain Museum, and quaint dining and shopping in Big Timber.
Open for the 2026 Season- Store hours limited through April 30. 
Reserve your site here on our website or call 406 932 6569. If no answer call 406 321 0444. 
Late arrivals welcome: use our after-hours dropbox or reserve in advance and we will leave your check in info next to the front door.
We look forward to a great summer in the mountains with you!

Your park host: Jonathan Brydon

Campground Amenities

  • 50 Max Amp
  • 110' Max Length
  • Wi-Fi
  • Pool (5/30 - 9/7)
  • Snack Bar ($)
  • Propane ($)
  • Firewood ($)
  • Pavilion
  • Dog Park
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Ways to Stay

KOA Journey

KOA Journey Campgrounds

KOA Journey campgrounds offer the perfect oasis 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

Care Camps Weekend

Join Us for Care Camps Weekend May 7-8, 2027 

Valid: May 7–8, 2027 
Discount Code: CCW
Stay at a participating KOA campground on Friday, May 7, and receive 50%* off your Saturday, May 8 stay. KOA will then donate 50% of the funds raised from Saturday night's stays to the Care Camps Foundation.  

Care Camps Foundation is a national non-profit organization that funds 100+ medically supervised pediatric oncology camps across the US and Canada. Their mission is to give joy, hope, and the healing power of the outdoors to children with cancer and their families. KOA has been a foundational partner to Care Camps since 1984.  You can learn more at carecamps.org. 
 *Offer valid only at participating KOA locations. Discount applies to one site for two consecutive nights (Friday, May 7 and Saturday, May 8) at the same KOA. Sites may be limited. Only KOA Rewards discounts apply. 

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Local Area

Greycliff Mill

Just 4 miles from the Big Timber KOA, this working water-powered gristmill is housed in a historic timber-frame building alongside a coffee shop serving breakfast and lunch. While you are there, check out the underground Greycliff Market and Creamery, where you can buy local goods and sample cheeses made in their cheese cave. Venture down an 80 foot underground tunnel to see a timber-frame greenhouse with flowers, waterfalls and trout. There are walking trails and swings to enjoy, as well as resident buffalo to visit.

9 Greycliff Creek Ln

Greycliff, MT 59033

406-930-0870

Website

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Natural Bridge State Park

A 30 minute drive south of Big Timber brings you to Natural Bridge Falls . The paved paths start at the parking lot and meander along the Boulder River. There are several viewing points with signs telling about the area, falls and wildlife. In the spring, there are actually three separate falls. Later in the year, the river flows underground to reveal the limestone bedrock. Toilet facilities and picnic tables are available. A well-maintained dirt trail leads to a scenic point directly across from the falls. For a day hike, continue on the Green Mountain Trail. The terrain will change from grassland to heavy timber. Look for Limber Pine, Lodge Pole Pine, Douglas Fir and wildflowers galore. Deer, bear, elk, and small animals may be seen along the way.

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Big Timber Falls at Halfmoon Park

Take 191 north out of town less than 10 miles, then take a left on Wormser Loop Rd.  Enjoy the beautiful drive as you follow Big Timber Creek into the Crazy Mountains. Halfmoon Park is equipped with picnic areas, a parking area for day hikes, and public restrooms.  It's a short and easy hike from the parking area to the majestic Big Timber Falls. For the hardier and more adventurous, Blue Lake is another 5.5 miles up the trail and offers beautiful surroundings and great fishing!

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Crazy Mountains

There are several legends as to how they got their name. One of them is that a woman (some say Indian - some say white) went mad on the prairie, possibly due to the death of her family, and took refuge in the mountains. Indian beliefs require that crazy people to be left alone, and so she was.

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