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Obsidian Flat
FSU.S. Forest Service — LEE VINING · California · Inyo National Forest
| Agency | FSU.S. Forest Service |
|---|---|
| Area | Inyo National Forest |
| Location | LEE VINING · California · Inyo National Forest · 37.73333, -119.01667 · Map |
| Sites | 1 public sites counted from the federal listing — 1 group standard nonelectric |
| Getting a site | Reservable — the federal listing marks this campground as taking reservations. Some sites or seasons may still be first-come; the listing’s own words are below. |
| Hookups | Electric at 0 of 1 sites Water hookups at 0 of 1 sites Sewer hookups at 0 of 1 sites Full hookups (all three at one site) at 0 of 1 sites Counted site by site from affirmative reports in the federal record. A site with no report is not counted either way. |
| Max RV length | Longest reported site fits 40 ft Sites that fit at least — 25 ft: 1 sites · 30 ft: 1 sites · 35 ft: 1 sites · 40 ft: 1 sites |
| Months open | Not in federal data — the federal listing does not publish a season for this campground. Check the official description below or Recreation.gov. |
| Fees | $20 dollars per night |
| Check-in / out | In 3:00 PM · Out 2:00 PM (most common in the listing) |
| Accessibility | N |
| Phone | 760-647-3045 |
Check availability & book on Recreation.gov →
This site takes no reservations and shows no live availability. Source: Recreation.gov (RIDB export pulled November 5, 2026); this listing was last updated in the federal record on 2026-02-25.
From the official listing
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 09/30/2025 this location is staffed. Please call (760) 647-3044 to speak with local staff. From 10/01/2025 to 04/30/2026 this location is unstaffed. Please call (760) 647-3005 for general information. Nearby Attractions Hikers can access the scenic Ansel Adams Wilderness via nearby trails, and Yosemite National Park is a great day trip.
Ansel Adams Wilderness
Yosemite National Park
Directions, from the listing
Heading North
From U.S. Highway 395 and State Highway 203 (Mammoth Lakes Junction), travel 8.2 miles north on 395. Turn west onto Deadman Road and follow for 3.2 miles to Upper Deadman Campground. Turn toward the Group Campground turnoff onto FS Road 2S05F. Continue one mile to the campground on the right.
Heading South
From U.S. Highway 395 and State Highway 158 (June Lake Jucntion South) travel approximately 6.5 miles south on 395 and turn right onto Deadman Road and follow for 3.2 miles to Upper Deadman Campground. Turn toward the Group Campground turnoff onto FS Road 2S05F, across the road. Continue one mile to the campground on the right.
Nearest federal campgrounds
4 mi straight-line · June Lake CaliforniaFSU.S. Forest ServiceGull Lake Campground
5 mi straight-line · CaliforniaFSU.S. Forest ServiceJune Lake
5 mi straight-line · CaliforniaFSU.S. Forest ServiceAgnew Horse Camp
5 mi straight-line · MAMMOTH LAKES CaliforniaFSU.S. Forest ServiceAgnew Meadows Group Camp
5 mi straight-line · MAMMOTH LAKES California
Trip Card — Obsidian Flat
LEE VINING · California · Inyo National Forest
| Agency | FS · U.S. Forest Service |
|---|---|
| Location | LEE VINING · California · Inyo National Forest |
| Fees | $20 dollars per night |
| Getting a site | Reservable |
| Hookups | None reported |
| Max RV | Up to 40 ft |
| Months open | Not in federal data |
| Sites | 1 sites |
Book: recreation.gov/camping/campgrounds/231955 · Source: Recreation.gov, pulled November 5, 2026. Facility details come from federal recreation data and may be out of date — this site takes no reservations and shows no live availability; confirm details and book through Recreation.gov or the managing agency.