Accessible via a well-maintained gravel road just minutes from Big Timber, Big Rock sits within a state fishing access site along a flowing stretch of river. The campground requires a conservation license for overnight stays and operates on a first-come, first-served basis. Campers find approximately five designated sites with rock fire rings, though site availability varies and some spots fill quickly during peak fishing season.

The river runs directly through the camping area, providing immediate water access for fishing, wading, and cooling off during warm days. Two sites sit closest to the water with partial shade, while others are positioned further back but remain within walking distance of the riverbank. Abby M. notes the area stays "super quiet" even with multiple campers present. Wildlife sightings include deer, and visitors occasionally report bear activity, making proper food storage essential.

The single vault toilet receives regular maintenance and restocking. Some sites include picnic tables, though not all are equipped. Cell service remains limited or nonexistent throughout the area. Site conditions can vary significantly, with some reviewers finding well-maintained spots while others encounter litter or pet waste issues depending on recent visitor behavior.

Pack out all trash and arrive with a current Montana conservation license to avoid complications.

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Location

Public Campground

Big Rock is located in Montana

Detail location of campground

Coordinates

45.79200016 N
109.96500018 W

Open in Google Maps

Connectivity

  • signal strength bars
    T-MobileLTE
    Some Coverage
    Verified by 8 users
    Last on 4/3/26
  • signal strength bars
    VerizonLTE
    Good Coverage
    Verified by 11 users
    Last on 4/3/26
  • signal strength bars
    AT&TLTE
    Some Coverage

Connectivity

  • signal strength bars
    T-MobileLTE
    Some Coverage
    Verified by 8 users
    Last on 4/3/26
  • signal strength bars
    VerizonLTE
    Good Coverage
    Verified by 11 users
    Last on 4/3/26
  • signal strength bars
    AT&TLTE
    Some Coverage

Access

  • Drive-In
    Park next to your site
  • Walk-In
    Park in a lot, walk to your site.

Site Types

  • Tent Sites
  • RV Sites
  • Standard (Tent/RV)
  • Group
  • Tent Cabin

Features

For Campers

  • ADA Access
  • Picnic Table
  • Phone Service
  • Toilets
  • Pets
  • Fires

For Vehicles

  • Pull-Through Sites

Contact

General Info

Drive Time


Reviews

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5 Stars

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1 Star

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15%

3.5

out of 5

7 Reviews

Many campers appreciated the scenic riverside location with clean facilities and peaceful atmosphere. Some feedback indicated cleanliness concerns at certain sites, though most found it a lovely free camping spot perfect for swimming and fishing.

Reviewed Mar. 3, 2026

Beautiful and spacious

I had such a wonderful stay at Big Rock Campground! Note: no phone service and you need to have a conservation license.

It was incredibly easy to find, which made arriving stress-free. The campground sites themselves are absolutely incredible, spacious, tidy, and thoughtfully laid out with easy access in and out.

The location is hard to beat. Being right by the stream adds such a peaceful touch, and the sunsets and sunrises here are truly beautiful. Waking up to that kind of view is something special. There are also some nice walking paths/trails nearby, perfect for stretching your legs and taking in the scenery.

The vaulted toilet is as expected, nothing amazing but accessible. Overall, it was a genuinely positive experience from start to finish. I would absolutely stay here again!

Site1
Month of VisitMarch
  • Review photo of Big Rock by Penny G., March 3, 2026
  • Review photo of Big Rock by Penny G., March 3, 2026
  • Review photo of Big Rock by Penny G., March 3, 2026
Reviewed Jul. 30, 2025

Temporarily closed for repairs

Looks like it would be a nice place to camp and has fishing access but currently it's closed and there are work trucks doing repairs and I'm not sure when it will be open again but it is very easy to access off a well maintained gravel road just a few miles from the highway

Month of VisitJuly
  • Review photo of Big Rock by Steve M., July 30, 2025
  • Review photo of Big Rock by Steve M., July 30, 2025
  • Review photo of Big Rock by Steve M., July 30, 2025
  • (7) View All
Reviewed Sep. 2, 2022

Would’ve been nice …

Rough gravel road to get to the spots & there are only 5 of them . 2 are on the river & looked pretty decent with some shade. The other 2 sit back further from the river but are a quick walk over to the waters edge . These spots looked shady too & tucked away. The only other spot is right as you pull into the area & doesn’t really even look like a spot . It was the only 1 open & we had to get out to double check that it was even a spot at all. Unfortunately it was absolutely filthy with trash & covered in dog feces . I get that it’s a free area but we’ve used a lot of free dispersed camping & fishing access spots over the past 2 weeks & they were all treated with the utmost respect. I’m sad that this place looked like it it. Not cool. We hightailed it outta there & stayed in the Walmart parking lot since nothing was available nearby.

Month of VisitAugust
Reviewed Sep. 1, 2022

Eeeep. This place is awesome!

We LOVED it here. This is primitive. Not water or hook ups or trash but there is a pit toilet. Right by a beautiful stretch of the river, perfect for spending the day lounging in the water, swimming, fishing etc. There are prob 5 sites here and it was BUSY mid week in August when we were here. Lots of folks fishing/here for the day and all sites full for overnight. Some sites have picnic tables and all have rock fire rings. Really, so lovely and relaxing. Would def stay again and again if we are in the are. Best of all…it’s free!! Pack in/pack out. Be respectful of others. Keep your dogs on a leash and pick up after your self. Keep this place as lovely as we found it!!

Month of VisitAugust
  • Review photo of Big Rock by Aliza  N., September 1, 2022
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  • Review photo of Big Rock by Aliza  N., September 1, 2022
  • (5) View All
Reviewed Sep. 13, 2021

Quiet and clean

Stayed during a cross country trip.  Awesome location, 10 minutes from the expressway and on the river.  About a half dozen sites with a pit toilet that was stocked and clean.  My site was perfect for a tent, my dog and I enjoyed a peaceful night.  Will certainly stay here again when traveling through the area.

Month of VisitSeptember
Reviewed Aug. 28, 2021

Stayed a night but would stay longer

Lovely little spot! Showed up around 5pm Friday and there was only 1 other camper. Had a third join by the end of the night but was super quiet the entire time. Beautiful scenery and river running through. Saw several deer and heard a few others mention seeing a grizzly every once in a while so keep items secured! Definitely would stay again. Vault toilet was clean and well stocked. 6 sites with rock fire rings. A couple sites had picnic tables too!

Month of VisitAugust
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Reviewed Jun. 26, 2021

Camping by the River

Great spot not too far in from Big timber. Lots of river running through the campground and low enough to enjoy a swim, fish, or get your feet wet. Restroom is located here. Not far from town so for dinner or anything else you might have forgot.

Month of VisitJune
  • Review photo of Big Rock by Robert B., June 26, 2021
  • Review photo of Big Rock by Robert B., June 26, 2021
  • Review photo of Big Rock by Robert B., June 26, 2021

Frequently Asked Questions

Where is Big Rock Campground located in Montana?

Big Rock Campground is located about 10 minutes from Interstate 90 near Big Timber, Montana. It's situated along a river, accessible via a gravel road just a few miles from the highway. The campground's proximity to Big Timber makes it convenient for campers who need to pick up supplies or grab dinner in town during their stay.

How does Big Rock Campground compare to other campgrounds near Big Timber, MT?

Big Rock Campground is a primitive, intimate setting with only about 5 sites, distinguishing it from larger facilities in the area. It offers basic amenities with just a clean pit toilet and no water, hookups, or trash service. What makes it stand out is the direct river access for swimming, fishing, and lounging. The campground features some shaded sites, with the best spots located right on the river. It gets busy during peak season despite its small size, indicating its popularity compared to alternatives near Big Timber.

What fishing opportunities are available at Big Rock Campground?

Big Rock Campground offers excellent fishing access directly from the campsite. The river runs through the campground, providing multiple spots for anglers to cast their lines. The water is also shallow enough in areas to wade while fishing. Some sites are positioned right on the riverbank, giving campers prime fishing access just steps from their tent or vehicle.