Oso Group
The Oso Group Campground is nestled in the beautiful Barton Flats area of the San Bernardino Mountains. It is surrounded by picturesque pine trees and miles of scenic landscape. In addition to a nearby lake and river access, a variety hiking, biking and horseback riding trails can be accessed from the campground. Its location also provides a great place for visitors to relax, take in the fresh mountain air, and enjoy the beautiful scenery.
More like this: reservable in California · big rigs in California · pets allowed in California · group sites in California
Check availability on Recreation.gov ↗
Site mix
| Group sites | 1 |
Site guide
Will my RV fit
The longest site here provides 40 feet of vehicle capacity. Most sites are shorter.
1 site. Tap a filter to narrow the list; the map follows.
| Site | Entry | Fits, ft | Surface | Shade | People / vehicles | Fires |
|---|---|---|---|---|---|---|
| 1 | Pull-through | 40 | Gravel | Partial | 100 / 25 | Yes |
Per-site records as published by the managing agency on Recreation.gov. Blank cells mean the agency listed nothing for that site. Check-in 2:00 PM, checkout 1:00 PM.
Amenities & rules
| Hookups | None |
| Max vehicle length | 40 ft |
| Equipment | RVs & trailers, Tents |
| Pets | Allowed |
| Campfires | Allowed, subject to restrictions |
The group campground offers one large group campsite, available for tent and RV camping. It can accommodate up to 100 people and about 20 vehicles. There are no utility hookups at the site and roads, as well as the parking area, are gravel and dirt. The site is equipped with multiple tables, a campfire circle and grills. Flush toilets and drinking water are provided at the campground. Tent pads are shaded but group areas are primarily in the open.
Individual sites vary. Confirm on Recreation.gov or with the managing office.
Season & status
| Status | Open |
| Forest | San Bernardino National Forest |
| Booking | Call 1-877-444-6777 or visit www.recreation.gov. Reservations can be made as early as 12 months or as late as 24 hours in advance based on availability. |
| Fees | Single Site $480 - Holiday $490 |
| Rules | Campground capacity, maximum of 100 persons and 20 vehicles. This campground requires a 2 day minimum stay on weekends. This campground requires a 3 day minimum stay on holiday weekends. |
Weather by month
Getting there
Take I-10 East to Redlands. Take the University Street exit, EXIT 80. Turn left (northbound) on University Street. Turn right onto E. Lugonia Avenue/SR-38. Continue on State Highway 38 for approximately 22 miles to the campground entrance.
| Coordinates | 34.1757° N, 116.8625° W · Directions ↗ |
Charges and cancellations
Any location or activity requiring a permit or lottery will have unique requirements and policies. Please check individual facility pages for pertinent information for those sites. Booking Window For most locations, you can reserve six months in advance of your stay for individual sites and 12 months in advance for group sites. There are some exceptions, so it is best to check with each facility. Change and Cancellation Policies and Fees Overnight and Day Use Facilities: To ensure fairness, reservation arrival or departure dates may not be changed beyond the booking window until 18 days after booking the reservation. Camping / Day Use: A $10.00 service fee will apply if you change or cancel your reservation (including campsites, cabins, lookouts, group facilities, etc.).
Supplies & services
| Dump station | Dump station ↗ | 0.8 mi |
| RV sales & service | Mountain Air Mobile Home Sales ↗ | 17.5 mi |
| Outdoor gear | Sportsman's Warehouse ↗ | 24.6 mi |
Locations © OpenStreetMap contributors. Call ahead; hours change seasonally.
Explore
Worth a stop
The Grayback Amphitheater on State Route 38 provides evening educational programs on most Saturdays and Sundays throughout the summer months. Programs are hosted by the San Gorgonio Wilderness Association and pertain to the area's background that is rich with history.
- 1.3 miJenks Lake Day Use Area ↗Day use
- 5.5 mi
- 6.7 mi
- 7.8 miGrays Peak Trailhead Day Use ↗Trailhead
- 9.3 miCactus Flat Ohv Staging Area ↗OHV / range
Trails nearby
- 0.3 miSanta Ana River Trail D Spur ↗0.5 mi trail
- 0.5 miRio Monte ↗2.3 mi trail
- 0.5 miSanta Ana River Trail C Spur ↗1 mi trail
- 0.5 miSanta Ana River Trail B Spur ↗1.1 mi trail
- 0.8 miSanta Ana River Trail a Spur ↗0.9 mi trail
- 1.2 miSouth Fork ↗9.9 mi trail
Trail and trailhead records are the Forest Service's. Distances are straight-line to the nearer trail end. Trail conditions are not tracked here.
Public land it sits in
This campground sits inside San Bernardino National Forest.
- inSan Bernardino National Forest ↗National Forest · Forest Service · 805,483 acres
- 2.4 miSan Gorgonio Wilderness ↗Wilderness · BLM/FS · 101,574 acres
- 2.8 miSand to Snow National Monument ↗National Monument · Bureau of Land Management · 174,844 acres
Each unit is published as a centre point and an acreage rather than a boundary, so this section stands it in for a circle of the same area. Whether a campground is inside, and how far it is from one it is outside, are both approximate.
Other campgrounds nearby
On the National Register nearby
- Henry Washington Survey MarkerObject · Big Bear City · 5.5 mi
Natural features
The campground is located in a dense pine forest, at an elevation of about 6,400 feet. The entrance to the Oso Group Campground is the same as for the neighboring Lobo Group Campground. Both share the region with a variety of wildlife and bird species.
Recreation
The campground provides access to the famed Santa Ana River Trail, which when completed will travel all the way from the mountains to the pacific ocean, providing spectacular views along the way. It is currently popular for hiking, biking and horseback riding. The Rio Monte Trail is also accessed from the campground, taking hikers to the Rio Monte Panorama, which overlooks the deep gorge of the Santa Ana River Valley. Visitors can also enjoy fishing and non-motorized boating at the nearby Jenks Lake, a small mountain lake with a picnic area and access to hiking trails. The lake is stocked with rainbow trout, as well as largemouth bass, bluegill, sunfish and catfish. Rowboats, canoes and kayaks are permitted and fishing is also available at the nearby Santa Ana River.
Guidebooks for California
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Titles come from Open Library's catalog, matched by subject heading or by title.
Reference
Questions people ask
Do I need a reservation at Oso Group?
Sites at Oso Group are reservable on Recreation.gov. Call 1-877-444-6777 or visit www.recreation.gov. Any walk-up sites are listed on the booking page.
Source: Recreation.gov
How much does it cost to camp at Oso Group?
Single Site $480 - Holiday $490
Source: Recreation.gov
What time is check-in at Oso Group?
Check-in 2:00 PM, checkout 1:00 PM.
Source: Recreation.gov
What does it cost to cancel a reservation at Oso Group?
Camping / Day Use: A $10.00 service fee will apply if you change or cancel your reservation (including campsites, cabins, lookouts, group facilities, etc.).
Source: Charges and cancellations
Is Oso Group open right now?
Open as of Oct 16, 2026.
Source: Forest Service status
How many sites does Oso Group have?
1 site, including 1 group site.
Source: Recreation.gov
Will my RV fit at Oso Group?
The longest site here provides 40 feet of vehicle capacity. Most sites are shorter. The sidebar tool checks a trailer or motorhome length against every site.
Source: Will my RV fit
Are there showers or a dump station at Oso Group?
Flush toilets and drinking water are provided at the campground.
Source: Recreation.gov
Are pets allowed at Oso Group?
Yes, pets are allowed at Oso Group. Leash rules apply.
Source: Recreation.gov
Can I have a campfire at Oso Group?
Fires are allowed in the provided rings under normal conditions. Campground capacity, maximum of 100 persons and 20 vehicles.
Source: Recreation.gov
Is there cell service at Oso Group?
FCC coverage maps show Verizon 4G LTE, AT&T 5G, and T-Mobile 5G at the campground point. Terrain changes that from one site to the next.
Source: FCC Broadband Map
What is there to do at Oso Group?
The campground provides access to the famed Santa Ana River Trail, which when completed will travel all the way from the mountains to the pacific ocean, providing spectacular views along the way. The Recreation section on this page has the rest.
Source: Recreation