Established Camping
Inyo National Forest Obsidian Flat Group Campground
Inyo National Forest Obsidian Flat Group Campground is situated in a forested area with a mix of pine trees and volcanic rock formations. The weather in this region typically sees highs around 80°F in summer and lows near 20°F in winter. Nearby attractions include Mono Lake and the scenic Tioga Pass, offering opportunities for exploration and sightseeing.
Description
US Forest Service
Inyo National Forest
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
Fee Info
$20 dollars per night
Location
Inyo National Forest Obsidian Flat Group Campground is located in California
Directions
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.
Address
BOX 429
Lee vining, CA 93541
Coordinates
37.7333333 N
119.0166667 W
Access
- Drive-InPark next to your site
- Walk-InPark in a lot, walk to your site.
Connectivity
T-Mobile5GGood Coverage
VerizonLTESome Coverage
AT&T5GExcellent Coverage
Site Types
- Tent Sites
- RV Sites
- Standard (Tent/RV)
- Group
Features
For Campers
- Trash
- Reservable
- Toilets
- Alcohol
