Caribou-Targhee National Forest, Idaho
- Fee per night$130
- Seasonnot listed
- RV length (some sites)Up to 50 ft
- Drinking wateryes
- Electricyes
At a glance: Confirmed: electric hookups and drinking water. No flush toilets. Listed for rigs up to 50 ft. Not listed: showers.
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Amenities
“Not listed” means the official sources don’t say - it does not mean “no”.
- Electric hookups Yes
- Drinking water Yes
- Flush toilets No
- Showers Not listed
- Dump station Not listed
- Water hookups at sites Yes
- Sewer hookups Not listed
- Tent sites Yes
- RV / trailer sites Yes
- Reservable online Yes
Sites, fees and season
- Campsites
- 56
- Longest RV / trailer listed
- Up to 50 ft at selected sites (not every site; check access and your site)
- Elevation
- 6,330 ft
- Phone
- (208) 558-7658 (campground or managing office)
- Standard site fee
- $130 per site per night (from the official fee text below; group and per-person rates are listed there)
Official fee information
Group Site Fees: $65.00 per night Sunday through Thursday and $130.00 per night Friday and Saturday. A weekly rate is not available.
The listed length is the longest site; not every site fits that size. Confirm your site on the official reservation page.
Location and nearby campgrounds
Location on the map · Driving directions · 44.43250, -111.42611 (the official listing point; check the access road for large rigs)
- Buffalo (Idaho) 2.9 mi straight-line
- Flat Rock (Idaho) 6.2 mi straight-line
- Riverside (Id - Targhee) 11.6 mi straight-line
- Warm River 22.3 mi straight-line
- Madison Campground 31.5 mi straight-line
From the official listing description, directions and rules
Buttermilk Campground is located approximately 30 miles southwest of West Yellowstone, Montana and 32 miles north of Ashton, Idaho in beautiful Island Park, Idaho.
Buttermilk sits next to Island Park Reservoir at an elevation of 6,200 feet. Visitors love Island Park for its world-class fishing and outstanding scenery and wildlife viewing opportunities.
Recreation
The Island Park area is prized for its fishing; the Henry's Fork is known as one of the nation's best fly-fishing streams. Anglers cast for rainbow, cutthroat and brook trout and Kokanee salmon.
Island Park Reservoir offers boating, water skiing and excellent fishing opportunities. The reservoir is used for irrigation so the water level recedes throughout the summer, but is generally useable all season. Henry's Lake is nearby.
Hiking, biking, horseback riding and ATVing are popular activities. Many miles of trails are in the area, including the Continental Divide National Scenic Trail and the Nez Perce Trail.
The Big Springs National Recreation Water Trail offers an approximately three-hour float or canoe trip through beautiful scenery. Wildlife, including moose, bald eagles and Sandhill cranes, are often seen along the trail.
Facilities
The campground contains two loops for single family camping and one loop for group camping, with a total of 55 sites. The large group site can accommodate up to 150 people. Site 038 has 15-amp electric hookups.
Weather forecast - next 7 days
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Climate by month
Average daily high and low and monthly precipitation, 1991-2020 normals from the NOAA station Island Park - 2.9 mi away, station at 6,290 ft - about the same height as the campground. Long-term averages, not a forecast; the open season is listed separately above.
| Month | High °F | Low °F | Precip. in |
|---|---|---|---|
| Jan | 26 | 6 | 3.53 |
| Feb | 30 | 8 | 2.64 |
| Mar | 39 | 14 | 2.05 |
| Apr | 47 | 23 | 2.37 |
| May | 59 | 32 | 2.99 |
| Jun | 67 | 38 | 2.63 |
| Jul | 77 | 43 | 1.17 |
| Aug | 77 | 40 | 1.14 |
| Sep | 68 | 32 | 1.66 |
| Oct | 51 | 24 | 2.09 |
| Nov | 36 | 14 | 2.54 |
| Dec | 26 | 6 | 4.01 |
Highlight months with an average high between and °F:
Photos from visitors
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Reviews are the personal experience of registered visitors. They do not change the official facts above; a reported problem (for example "the water was off") is checked against the official sources.
Questions & answers
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Sources and data dates where every fact comes from
| Fact | Source | Fetched from the source |
|---|---|---|
| Campsites | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Reservable online | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Tent sites | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| RV / trailer sites | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Electric hookups | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Water hookups at sites | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Drinking water | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Flush toilets | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Longest RV / trailer listed | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Elevation | USGS elevation (EPQS) | Oct 26, 2026 |
| Lowest listed fee | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Highest listed fee | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Official page | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Official reservations | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
| Phone | Recreation.gov (RIDB) | Oct 26, 2026 source updated Feb 25, 2026 |
Last successful data update for this page: Oct 26, 2026. That is when we last read the official sources - not a personal visit, and not the date the source itself changed (shown per fact above). Found something wrong? Report an error.