Obsidian Flat
Campground · California · 1 bookable site ·
Managed by the USDA Forest Service
San Joaquin Roadless Area (Roadlessarea Rule (2001)) · Open Access
- 1
- Bookable site
- up to 50
- People per site
- 7,872 ft
- Elevation
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
The facts
- Season: Mid May - September — USDA Forest Service, Aug 24, 2026
- 1 bookable site
- Up to 50 people per site
- Loops: OBSI
Site types
- 1 Group Standard Nonelectric
1 campsite at Obsidian Flat
Check-in 3:00 PM · Check-out 2:00 PM
| Site | Loop | Type | Entry | Surface | Max rig | People | |
|---|---|---|---|---|---|---|---|
| 1 | OBSI | Group Standard Nonelectric | Back In | Gravel | — | 50 |
Getting there
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.
37.73333, -119.01667 · 37°43'60.0"N 119°1'0.0"W
Typical weather
Typically 78°F in Jul, down to 41°F in Feb.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 41 | 41 | 46 | 51 | 60 | 70 | 78 | 77 | 71 | 61 | 49 | 41 |
| Low °F | 17 | 18 | 22 | 27 | 35 | 42 | 49 | 47 | 40 | 30 | 23 | 17 |
| Precip in | 4.2 | 3.8 | 3.3 | 1.5 | 1.5 | 0.5 | 0.5 | 0.5 | 0.5 | 1.4 | 2.0 | 4.1 |
1991–2020 averages from the nearest NOAA station, 6.6 mi away — not measured at the facility itself, and elevation can make a real difference over that distance.
Map
Fees and stay limits
$20 dollars per night
From Recreation.gov, which is not always current. The operator's own page is the authority on what you will be charged.
More photos
Member photos
Common questions about Obsidian Flat
- Can you reserve a site at Obsidian Flat?
- Yes, Obsidian Flat is reservable through Recreation.gov.
- How many campsites does Obsidian Flat have?
- 1 site.
Also listed by
Obsidian Flat also appears in other federal recreation data. Facts below are matched by name and location, not confirmed by Obsidian Flat's operator.
Camping near Obsidian Flat
- Reversed Creek Campground 4.5 mi · Campground · we watch it
- Gull Lake Campground 4.5 mi · Campground · we watch it
- June Lake 4.6 mi · Campground · we watch it
- Agnew Meadows Group Camp 5.3 mi · Campground · we watch it
- Agnew Horse Camp 5.3 mi · Campground · we watch it
- Oh Ridge 5.5 mi · Campground · we watch it
- Old Shady Rest Campground 6.5 mi · Campground · we watch it
- New Shady Rest Campground 6.6 mi · Campground · we watch it
- Pine Glen 6.7 mi · Campground · we watch it
- Glass Creek Campground 2 mi · Campground
- Hartley Springs Campground 2.9 mi · Campground
- Upper Soda Springs Campground 6.5 mi · Campground
Contact
- Phone 760-647-3045
- Book Recreation.gov
Recreation.gov last updated this record on 2026-02-25.
Facility information and photographs from Recreation.gov (RIDB). SpotOpened is not affiliated with Recreation.gov or any federal agency.
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