Campground

Yellowstone Park / Mountainside KOA Journey

CampgroundOPERATIONAL★ 4.3
Wooden campground office with a green metal roof at Yellowstone National Park, surrounded by pines and a large paved lot.

You’re staying at Yellowstone Park Mountainside KOA Journey just outside West Yellowstone. RV sites offer 20/30/50 amp, water, and some pull-throughs up to 110 ft with mountain views, while tent sites include creek views and large fire pits. Cabins are available, and the grounds are bear country with clean showers and an on-site store; expect high demand in peak season and some traffic noise from the main road.

Quick facts

Reservation System
KOA Private Booking
Reservation Window
Reservations can be made up to 18 months in advance through KOA's private booking system. Book online at https://koa.com/campgrounds/mountainside/ or by phone; peak-season (summer) dates fill quickly.
Reservation Tips
Book well in advance; use the KOA Mountainside page for direct booking; inquire about group sites early
Season Dates
Mid-May to October

Reservations & season

Reservation System
KOA Private Booking
Reservation Window
Reservations can be made up to 18 months in advance through KOA's private booking system. Book online at https://koa.com/campgrounds/mountainside/ or by phone; peak-season (summer) dates fill quickly.
Reservation Tips
Book well in advance; use the KOA Mountainside page for direct booking; inquire about group sites early
Season Dates
Mid-May to October
Fills Up Speed
High demand; books quickly in peak season
Per Night Cost
$90-$100/night
Extra Vehicle Fees
No published extra-vehicle fee listed on the Mountainside page.
Day Use Fees
No published day-use rate listed.
Passes Accepted
Military discounts are listed; there is no published mention of America the Beautiful or other passes.

Sites & RV fit

Sites Total
Total site count is not published; Mountainside KOA encompasses RV sites, tent sites, and deluxe cabins.
Site Types
RV sites, Tent sites, Cabins
Site Type Breakdown
RV sites, Tent sites, Deluxe cabins
RV Max Length
110 feet
Group Sites Available
1
Group Site Capacity
Inquiry with campground
Hookups
20/30/50 amp, water, electric; some full hookups
Site Features
Fire ring, picnic table, cable TV; water/electric hookups; some creek-view tent sites; pull-throughs with mountain views
Ground Type
Gravel, dirt, some grass
Site Privacy
Some sites parking-lot style; creek/wooded areas offer more privacy

Facilities

Bathroom Types
Flush toilets with lights
Showers Available
Clean, spacious showers with ample hot water
Potable Water
Potable spigots; communal water available
Dump Station
On-site dump station
Trash Service
General trash disposal; bear-proof dumpsters not explicitly mentioned
Camp Store
General store with basic supplies, pizza parlor, firewood, propane, gifts
Firewood Availability
Firewood for sale at camp store; gathering firewood prohibited
Cell Service
Mixed signal; download offline maps first
Nearby Facilities
Gas and groceries in West Yellowstone; services within a short drive

Access

Road Type
Paved and gravel
Road Conditions
Dusty in some sites; trees may obstruct large rigs in certain locations
Vehicle Restrictions
No published length limits; large rigs possible but verify site layout
Clearance Needed
Standard clearance; watch for branches
Gate Hours
Gate hours are not published; an after-hours registration box is available for late arrivals.
Distance From Entrance
7.5 miles
Nearest Gas Services
Gas and groceries near West Yellowstone
Elevation
Varies
Accessibility
No published information on ADA-accessible sites.

Rules & safety

Bear Country
Yes
Food Storage Requirements
Bear safety advised; follow posted rules
Fire Restrictions
Fire rings available; fires permitted; follow campground rules
Pets Allowed
Yes
Pet Restrictions
Leash rules apply; KampK9 dog park on-site
Generator Hours
No published generator hours.
Quiet Hours
Quiet hours not published; expect noise from traffic and dogs
Max Stay Limit
No maximum stay limit is published.
Alcohol Permitted
0

What it is like

Onsite Activities
Hiking and ATV trails into Gallatin National Forest; fishing in nearby creeks/ponds; horseback riding and ziplining nearby; playground, mining camp, yard games
Trailheads Nearby
Trails into Gallatin National Forest accessible directly from campground
Fishing Details
Fishing in nearby creeks and casting ponds
Wildlife Viewing
Bear country; wildlife activity possible; secure food
Shade Coverage
Some sites shaded by mature pines; others exposed
Scenic Views
Mountain views from pull-through sites; creek views from some tent sites
Noise Level
Highway noise and dog sounds on main thoroughfare
Best Time To Visit
Mid-May to October; peak in July-August
Vibe Check
Functional basecamp near Yellowstone with mountain views and kid-friendly amenities; not a remote wilderness retreat—some sites feel close to neighbors, and traffic noise is present
Camp Here If Skip If
  • ✅ BOOK IF: You need hookups up to 110 ft and 20/30/50A with water and proximity to West Yellowstone
  • ❌ SKIP IF: You crave total off-grid solitude and pristine forest seclusion
Tips Advice
  • Book early in peak season; KOA Mountainside fills fast
  • Bring a headlamp for 2am bathroom runs
  • Expect mixed ground surfaces; pack leveling blocks and ground cover
  • Store food properly; bear country precautions

More details

Park Area
Yellowstone National Park area, West Yellowstone, Montana (Gallatin County)
Family Friendly Notes
Family-friendly with playground and KampK9 dog park; some sites near main road may see more noise; bring earplugs for quiet hours
Senior Access Discounts
Senior-discount information is not published.
Nearby Attractions
West Yellowstone amenities; Yellowstone entrance area; approx. 7.5 miles to West Entrance
Terrain Type
Mix of flat loops and hillside terraces; some sites dusty
Temperature Ranges
Seasonal; warm days, cool nights
Snow Season
Varies
Monsoon Season
Varies
Setup Strategy
RV-ready pull-throughs up to 110 ft; mix of gravel and grass sites; internal roads are a mix of paved and gravel; plan for possible tree branches on larger rigs
Bath Laundry Recon
Showers are clean, spacious, and hot; laundry availability not documented
Review Summary
Expect clean showers and bathrooms with ample hot water; some sites feel parking-lot oriented and dusty, with tree obstructions for very large rigs; proximity to West Yellowstone is convenient and makes day trips to the park easy

Location

Grand Prismatic Spring glows with a blue center and orange rims at Yellowstone National Park, seen from a forest overlook.Yellowstone Mountainside campground cabin with a covered front porch, grill, and surrounding pine trees.A vibrant Yellowstone National Park landscape featuring a calm pond, green meadows, and a rainbow under dramatic clouds.Log cabin campground at Yellowstone Mountainside campground with a covered porch, grill, and forested seating area.

Frequently asked questions

Can my RV fit on the pull-through sites?

Pull-throughs up to 110 ft are available; some rigs up to 70 ft or 50 ft can fit, but site layout and trees may limit the largest rigs.

Are group sites available?

Yes, group sites exist; details require direct inquiry with the campground.

Is this bear country and what are food storage rules?

Yes, bear country. Follow bear safety precautions and store food securely; posted rules apply.

What amenities does the on-site store offer?

General store with basic supplies, pizza, firewood, propane, and gifts; plan ahead for groceries and fuel in West Yellowstone.

Are pets allowed and what about leashes?

Pets are allowed across RV, tent, and lodging sites; leash rules apply; KampK9 dog park is on site.

Mammoth Campground

Water spigots; no on-site showers; bear-country camping near Mammoth Hot Springs.

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Sources

Editorial review: YourNPGuide Editorial Team. Information is compiled from official sources, verified traveler reviews, and editorial research; no firsthand visit is implied unless explicitly documented. Learn how YourNPGuide works.

Last updated January 2026. Report an issue.