Open for the 2026 season. The campground operates from April 17 through September 20. Reservations required via Recreation.gov. Minimum 2-day stay on weekends, 3-day minimum on holiday weekends.
Extreme Heat Warning issued July 14 at 9:29AM PDT until July 16 at 8:00PM PDT by NWS San Diego CA
* WHAT...Hot and humid conditions with elevated overnight temperatures in the upper 60s to mid-70s. High temperatures in the 90s for inland Orange County and in the mountains below 6000 feet, in the mid 90s to 104 in the San Diego County valleys, and in the upper 90s to 108 for the Inland Empire expected. * WHERE...Orange County Inland Areas, Riverside County Mountains, San Bernardino County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, San Gorgonio Pass near Banning, and Santa Ana Mountains and Foothills. * WHEN...From 10 AM Wednesday to 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Those spending long periods outdoors will be at greater risk for heat health impacts.
About
Oso Group Campground is a reservable group site nestled in a dense pine forest within the Barton Flats Recreation Area of San Bernardino National Forest. Situated at an elevation of 6,600 feet along scenic Highway 38, this campground offers a peaceful mountain retreat approximately 22 miles from the Mill Creek Work Station. The single large group site can accommodate up to 100 people and 20 vehicles, making it ideal for family reunions, scout troops, and organized group outings. The campground features potable drinking water, flush toilets, multiple picnic tables, and a central group fire ring with grills. The site includes shaded tent pads and primarily open group areas. Bears frequent this area, so proper food storage is essential. Firewood must be purchased locally to prevent the spread of invasive pests. Recreation opportunities abound with access to hiking, biking, and horseback riding trails including the Santa Ana River Trail. Jenks Lake nearby offers fishing and non-motorized boating. The campground operates seasonally from mid-April through late September, with a minimum 2-day stay required on weekends and 3-day minimum on holiday weekends.
Directions
From I-10 East, take University Street exit (EXIT 80). Turn left on University Street, then right onto E. Lugonia Avenue/SR-38. Continue on Highway 38 approximately 22 miles from Mill Creek Work Station to the campground entrance.
Amenities
| Water | Yes |
| Fires Allowed | Yes |
| Toilets | Yes |
| Dump Station | — |
| Wifi | No |
| Pets Allowed | Yes |
| Showers | No |
| Electric Hookups | — |
| Water Hookups | — |
| Sewer Hookups | — |
| Camp Store | No |
| Price | $480 - $490 |
Vehicle
| Max RV Length | — |
| Max Trailer Length | — |
| Big Rig Friendly | — |
| Pull Through Sites | — |
Contact
| Phone | +1 (909) 382-2600 |
Cell Service
| AT&T | Yes |
| Verizon | Yes |
| T-Mobile | None |
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