Obsidian Flat
Obsidian Flat is a national forest campground in California. Hookups: no hookups.
- Type
- National forest campground
- Location
- California
- Coordinates
- 37.73333, -119.01667
- Hookups
- No hookups
- Activities
- Camping, Hiking, Off Highway Vehicle Trails, Wildlife Viewing
- Map
- Open in OpenStreetMap
- Phone
- 760-647-3045
Amenities
- Reservable sites
Only amenities a source confirms are listed; an amenity missing here is unknown, not absent.
About Obsidian Flat
Overview Obsidian Flat Group Campground, located just outside of Mammoth Lakes, California, provides an opportunity for a group to enjoy a secluded getaway in the eastern Sierra Nevada Mountains. With a peaceful forested setting and mountain views, the campground's location is perfect for relaxing and spending time in nature. The area is popular for exploring the surrounding forest and geology, as well as nearby hiking, bicycling, fishing and off-road vehicle riding options. Recreation The eastern Sierras are known for their exceptional trout fishing. Campers can try their luck in Deadman Creek. The majestic scenery and challenging trails are an obvious draw for hikers, mountain bikers and off-road vehicle enthusiasts. Deadman Creek Trail leads hikers into the spectacular Ansel Adams Wilderness. Facilities One group camping area can accommodate one group of up to 50 people, and up to five RVs (up to 40 feet in length) or 15 vehicles at a time. The site is fairly primitive and is equipped with a picnic table, vault toilet, campfire ring and bear-proof locker for food storage. Natural Features The campground is named after an obsidian lava flow nearby. It is situated in a pine forest at an elevation of 7,800 feet. Deadman Creek is adjacent to the facility, and several lakes are down the road. Many species of wildlife call the mountains home, such as black bear, mountain lions, mule deer, pine marten, pika and numerous fish and birds. Contact Info Between 05/01/2025 and
Cell coverage
No coverage data for this location yet.
Nearby RV services
- Dump station
- Mammoth Community Water District · 7.4 mi
- Water fill
- None mapped within 50 mi
- Propane
- None mapped within 50 mi
- Low clearances
- None mapped within 10 mi
- Off-road routes
- 1518 designated routes (807 mi) within 10 mi
Other places to stay nearby
| Name | Type | Distance | Fee | Hookups |
|---|---|---|---|---|
| Obsidian Flat Group Campground | Private campground | under 0.1 mi | — | — |
| Obsidian Flat Group Cg | National forest group campground | 0.6 mi | — | — |
| Upper Deadman Cg | National forest campground | 0.9 mi | — | — |
| Upper Deadman Campground | Free campsite | 0.9 mi | Free | — |
| Lower Deadman Campground | Free campsite | 0.9 mi | Free | — |
| Lower Deadman Cg | National forest campground | 1.0 mi | — | — |
Open Obsidian Flat in DryRig
Save it offline, check your rig's clearance on the drive in, and see what's nearby on the map.
Sources. Recreation.gov (RIDB). Updated June 2026. Facility facts only; DryRig does not publish ratings or reviews on this page.