Obsidian Flat
4.237 reviewsBOX 429, LEE VINING, CA 93541, USA
Quick Facts
7,800 ftPrice
$20/night
Booking
Reservable
Sites
1 campsites
Season
Peak season: June 15...
Cell
Unknown
Pets
Not Allowed
RV Friendly
Get DirectionsQuick Facts
7,800 ftPrice
$20/night
Booking
Reservable
Sites
1 campsites
Season
Peak season: June 15...
Cell
Unknown
Pets
Not Allowed
RV Friendly
Get DirectionsObsidian Flat
$20.00 - $20.00 / night
Campsite Fees
Group standard nonelectric sites are charged at a nightly rate of $20 during the peak season (June 15 - September 30). Additional fees include an $8...
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Standard Site Fee$0.00
Hookup Site Fee$0.00
Premium Site Fee$0.00
Hike and Bike Site Fee$0.00
Group Site Fee$20.00
Food Storage Locker Fee$0.00
Total Campsite Fees$20.00
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Recreation Dot Gov
Provider760-647-3045
What Campers Say
4.23
Satisfactory
Based on 7 reviews
5 Google reviews
Most mentioned
privacypeacefulspacious
"Reviews of Obsidian Flat Group Campground are mixed, with some users praising the secluded and peaceful location, while others found it difficult to locate or inaccessible due to the road conditions."
Fees & Passes at Obsidian Flat
$20/night
Campsite fees
Group Site
For large groups
Stay Limit: Maximum Consecutive Stay: You may stay up to 14 nights during a visit at this campground.
Cancellation: Reservations can be canceled anytime before the arrival date. A $10 cancellation fee applies. For la...
Prices verified November 27, 2025
Prices may vary by season and site type. Always confirm current rates on the official Inyo National Forest website.
Best Time to Camp at Obsidian Flat
The high Sierra climate here rewards visitors with remarkably clear skies—sunshine graces the campground 81% of the time during peak season. Expect crisp mountain air with comfortable daytime temperatures hovering around 52°F, while evenings cool to a refreshing 30°F, perfect for gathering around the campfire. As befits this lofty 7,800-foot perch, winter's grip can linger well into spring—snow may blanket the ground until late May or even June. The elevation demands respect: visitors ascending from lower altitudes should take time to acclimate to the thinner air.
Spring (Mar-May)
Wildflowers bloom, mild temperatures, fewer crowds. Great for hiking and photography.
Best
Summer (Jun-Aug)
Peak season with warm days. Most facilities open. Reserve ahead.
Fall (Sep-Nov)
Beautiful fall colors, cooler temps, quieter campgrounds. Ideal for peaceful trips.
Winter (Dec-Feb)
Snow activities available. Some facilities may close. Check conditions.
Planning Tips
- Peak Season: June 15 - September 30. Book 2-3 months ahead.
- Operating Season: Peak season: June 15 - September 30. No bookings are accepted outside of these dates.
- Current Alerts: Seasonal snow levels may affect access. Campground usually clears by late May or early June.
About Obsidian Flat
Hidden among the towering pines of the eastern Sierra Nevada, Obsidian Flat Group Campground offers an intimate escape into California's high country wilderness. At 7,800 feet elevation, this secluded group camping haven invites you to gather beneath ancient conifers while the gentle murmur of Deadman Creek provides nature's soundtrack. Whether you're drawn to trek the legendary trails of the nearby Ansel Adams Wilderness, cast a line into crystal-clear mountain waters, or explore rugged terrain on two wheels, this tranquil forest retreat serves as your perfect basecamp for Sierra adventures.
Obsidian Flat is a group campground offering a primitive camping experience, suitable for tents and RVs. It is focused on group use, accommodating up to 50 people.
Historical SignificanceThe campground takes its evocative name from the ancient volcanic glass formations that dot this dramatic landscape—remnants of the Sierra's fiery geological past. Deadman Creek, flowing alongside the campsites, carries its own frontier mystique through these historic mountains. This corner of the Sierra serves as a gateway to the storied Ansel Adams Wilderness, where the legendary photographer found endless inspiration among granite peaks and alpine meadows. The iconic vistas of nearby Yosemite National Park lie within easy reach, connecting campers to one of America's most celebrated natural treasures.
Weather and SeasonsThe high Sierra climate here rewards visitors with remarkably clear skies—sunshine graces the campground 81% of the time during peak season. Expect crisp mountain air with comfortable daytime temperatures hovering around 52°F, while evenings cool to a refreshing 30°F, perfect for gathering around the campfire. As befits this lofty 7,800-foot perch, winter's grip can linger well into spring—snow may blanket the ground until late May or even June. The elevation demands respect: visitors ascending from lower altitudes should take time to acclimate to the thinner air.
ElevationPerched at 7,800 feet in the eastern Sierra Nevada, this mountain aerie offers the rare combination of accessibility and alpine atmosphere. Here, the air grows thin and pure, the stars shine with exceptional brilliance, and every breath reminds you that you've ascended into California's magnificent high country.
Natural Features and SceneryNature has crafted a masterpiece at Obsidian Flat, where ancient pine forests frame views of volcanic glass formations that sparkle like black diamonds in the mountain sun. The melodious Deadman Creek threads through the landscape, its waters nurturing a vibrant ecosystem that includes pristine mountain lakes within easy hiking distance. This wild sanctuary hosts an impressive cast of Sierra natives: black bears lumber through the forest understory, elusive mountain lions patrol their territories, mule deer graze in meadow clearings, and playful pine martens dart among the branches. The skies and waters teem with life—from soaring raptors to rainbow trout hiding in shadowy pools—creating endless opportunities for wildlife watching and photography.
Geological RegionThe eastern Sierra Nevada reveals its volcanic heritage at this remarkable 7,800-foot campground, where obsidian flows tell the story of ancient eruptions that shaped these mountains. Nestled within a pristine pine forest ecosystem, the campground showcases the dramatic interplay between volcanic forces and glacial sculpting that defines this iconic mountain range. The surrounding landscape offers a living geology lesson, from glassy obsidian deposits to granite peaks carved by ice age glaciers.
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Campsite details
AccessibilityNo specific accessibility features were noted in the available materials.
Sites SizeThe site accommodates up to 50 people, 5 RVs (up to 40 ft in length), or 15 vehicles.
Sites PrivacyThe campground is very secluded, offering privacy and a peaceful environment.
Total Campsites1 campsites
Recommended CampsitesArrive before dark to avoid navigation difficulties. "When you pull off Deadman Creek Rd go straight, don't take any left or right turns, and there is a sign that says dead end—that's where you are going."
Best Campsites
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Reserving a campsite
Check-in
- Check-in times are not explicitly stated
- the reservation platform does not specify.
Check-out
- Check-out times are not explicitly stated
- the reservation platform does not specify.
Stay Limit
Maximum Consecutive Stay: You may stay up to 14 nights during a visit at this campground.
Guests Allowed Per Site
Up to 50 people per group site.
Groups
The group site can accommodate up to 50 people, 5 RVs (up to 40 feet in length), or 15 vehicles.
Tents
Tents are allowed
RV vehicles
RV vehicles are allowed
Primitive
Primitive are allowed
Reservable
Reservations are allowed
Site layoutSingle group site equipped with picnic tables, bear-proof lockers, vaulted toilets, and campfire rings.
Open and Closed SeasonPeak season: June 15 - September 30. No bookings are accepted outside of these dates.
Reservation PlatformsReservations can be made online through Recreation.gov, via a mobile app, or through the contact center.
Walk-in AvailabilityNo walk-up availability as the facility requires advance reservations.
Cancellation PolicyReservations can be canceled anytime before the arrival date. A $10 cancellation fee applies. For late cancellations (starting from 14 calendar days before check-in), the first night's recreation use fee is also subtracted. Additional penalties apply for no-shows or same-day changes.
Accomodation available
GroupGroup campsites are offered for larger parties such as families, schools, or organizations. These sites provide space and facilities to accommodate multiple people camping together.
Amenities available
Fire rings
Food storage lockers
Picnic tables
Vault toilets
Activities you can enjoy
The Obsidian Flat Group Campground is ideal for outdoor enthusiasts, offering activities such as hiking, fishing, wildlife viewing, and mountain biking. The nearby Deadman Creek Trail provides access to the Ansel Adams Wilderness, and trout fishing is popular in Deadman Creek.
Hiking
Hiking opportunities are abundant, with trails leading into the Ansel Adams Wilderness. The scenery is described as majestic, and the trails are challenging, catering to experienced hikers.Fishing
The campground is located adjacent to Deadman Creek, which is known for its trout fishing opportunities. One reviewer mentioned that the creek near the site disappears underground even with a good flow.Biking
Mountain biking is a popular activity in the area, and the challenging terrain is a draw for biking enthusiasts.Wildlife viewing
The campground is home to diverse wildlife, including black bears, mountain lions, mule deer, pine marten, pika, and various bird species.Winter Activities
The campground is typically inaccessible during the winter due to snow, as it is not cleared until late May or early June.Water Sports
No water sports are mentioned.Advertisement
Campground rules
- Pets are not allowed
- Campfire rings are provided at the campsite. "Don't Move Firewood: Protect California's forests from tree-killing pests by buying your firewood locally and burning it on-site."
Hazards
General hazardsPotential hazards include rocky unpaved roads, steep curves for trailers, and wildlife such as black bears and mountain lions. "Be bear aware; keep all food out of sight in approved containers or locked inside your vehicle."
Active alertsSeasonal snow levels may affect access. Campground usually clears by late May or early June.
Weather at Obsidian Flat
31
°F
Dec 7
Sunday
Clear sky
Precipitation: 0%
Gentle breeze, perfect for outdoor activities
Humidity: 42%
Comfortable humidity levels
Wind: 2.6 mph
Gentle breeze, perfect for outdoor activities
Clear sky
Weather History
Weather data powered by Open-Meteo
Detailed 7-Day Forecast
Powered by AI weather analysis
Reveal forecast
Emergency Services
Closest staffed emergency services available at Lee Vining during seasonal operation (May 1 - September 30). Call 760-647-3044 during staffed months and 760-647-3005 for general inquiries off-season.
Good to know
Peak season datesJune 15 - September 30
Trash and recyclingNo specific mention of trash or recycling facilities. Campers are advised to maintain a clean campsite and remove all food to prevent attracting wildlife.
Proximity to water featuresAdjacent to Deadman Creek. "Deadman Creek has trout but the weird creek right by the site disappears into the ground even with a good flow." Nearby lakes accessible down the road.
Common complaints"Sign pointed to group camping site at a road needing 4-wheel drive and we only had a camper van," "THE CAMPGROUND DOES NOT EXIST. IT IS A ROAD END WITH FALLEN TREES."
HostNo permanent on-site host. Contact Inyo National Forest staff for assistance during seasonal operation.
Campground Map
BOX 429, LEE VINING, CA 93541, USA
Driving directionsFrom 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.
The site is accessed via an unpaved dirt road (FS Road 2S05F) which is described as rocky but passable for most vehicles. User reviews mention difficulties with larger trailers around curves near the bathroom and recommend 4-wheel drive for some parts during specific conditions. "We made it in a Toyota Sienna and a Honda Civic, so any car would be able to travel without any problems."Nearby places
Mammoth Lakes (~15 miles), June Lake (~20 miles), Bishop (~40 miles), Lee Vining (~6.5 miles)
Nearby supplies
Basic supplies available in Lee Vining (~6.5 miles). Mammoth Lakes (~15 miles north) offers more comprehensive options for groceries, camping supplies, and fuel.
Reviews from booking and map sources
4.2
7 reviews
Obsidian Flat is satisfactory, placing it in the bottom 60% of campgrounds based on reviews
Reviews of Obsidian Flat Group Campground are mixed, with some users praising the secluded and peaceful location, while others found it difficult to locate or inaccessible due to the road conditions.
Review Summaries
Based on 7 reviews
What Campers Love
Users appreciated the seclusion, privacy, and spaciousness of the site. 'Very peaceful and private campground' and 'Great site, lots of space' were common sentiments. The bear-proof lockers and...
Based on 7 reviewsShow more
Common Concerns
Common complaints included difficulty in locating the site, with one reviewer stating, 'We never found the group camping site.' Another noted that it 'does not exist,' describing the area as a 'road...
Based on 7 reviewsShow more
Pro Tips & Recommendations
Campers recommend arriving before dark due to challenges in locating the site. One user advised, 'When you pull off Deadman Creek Rd go straight, don't take any left or right turns.' Bringing your...
Based on 7 reviewsShow more
Seasonal Insights
The campground is inaccessible in winter due to snow. Peak season occurs between mid-June and late September, with favorable weather conditions for camping.
Based on 7 reviewsCamper Quotes
1. 'Good secluded location, ideal for bigger groups or those who want more privacy when camping.' 2. 'The security door allowed us to feel safe even when alone in the campground.' 3. 'Little hard to...
Based on 7 reviewsShow more
Site-Specific Reviews
All reviews are focused on the single group site available. Positive feedback highlights the spaciousness and amenities, while negative feedback focuses on access difficulties.
Based on 7 reviewsAccessibility Features
No specific feedback related to accessibility features was provided in the reviews.
Based on 7 reviewsPet-Friendly Features
No specific feedback or policies regarding pets were mentioned in the reviews.
Based on 7 reviewsCamper Reviews by Outdoorithm campers
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Last updated November 27, 2025
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