Gas Vents Southeast Of Mary Lake
This backcountry thermal feature lies 7.4 miles from Grand Loop Road at 8,500 feet elevation, representing one of Yellowstone's most remote documented geothermal sites. The National Park Service records it as a hot gas vent in the Mary Lake drainage, accessible only through multi-day wilderness expeditions requiring permits and complete self-sufficiency.
The vents occupy high-elevation terrain in Yellowstone's interior backcountry, where subalpine forest meets alpine meadow conditions. The surrounding landscape experiences severe climate with average annual temperatures of 31.6 degrees Fahrenheit and 145 inches of annual snowfall. Steep topography characterizes the area, with thermal runoff creating localized vegetation patterns in otherwise dense lodgepole and subalpine fir forest. The site sits in a remote drainage system with no maintained trails.
This destination requires advanced wilderness skills including off-trail navigation, river crossing, and multi-day backpacking experience. Apply for backcountry permits months in advance; demand exceeds supply. Access window runs July through mid-September due to snowpack. Carry satellite communication device, detailed topographic maps, and bear-resistant food storage. Only attempt if experienced with remote Yellowstone backcountry conditions including potential thermal ground hazards.
The feature name describes its location relative to Mary Lake, a backcountry water body named during early Yellowstone survey expeditions. USGS thermal mapping teams reached this site during helicopter-supported surveys in the 1970s, documenting it as part of comprehensive efforts to catalog the park's thousands of thermal features regardless of accessibility.
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Overview Located about eight miles (13 km) south of Mammoth Hot Springs on the road to Norris, Indian Creek Campground—elevation 7,300 feet (2225 m)—sits near the base of the Gallatin Mountains and offers breathtaking views of Electric Peak. The area offers easy access to fishing and hiking. The campground is away from the main road and provides a quieter, more primitive, experience than many other locations. For reservations at the campgrounds managed by Yellowstone National Park Lodges (Fi...
At 8,500 feet, Gas Vents Southeast Of Mary Lake is in high-altitude territory where the air is noticeably thinner. Soaking in hot water accelerates dehydration and can amplify altitude effects like headache and fatigue. UV radiation is roughly 34% stronger here — wear sunscreen even on overcast days and take breaks from the water to rehydrate.
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Gas Vents Southeast Of Mary Lake requires a hike to reach, so pack light but prepared. Cold air temperatures make a changing robe or warm layers essential.
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