River Group
River Group emerges at 196 degrees Fahrenheit—159 degrees above ambient—at 7,191 feet elevation in Yellowstone National Park, accessed via a 1.3-kilometer walk from roads. The springs discharge in thermal terrain typical of Yellowstone's Lower Geyser Basin region under Protection Status 1 management by the National Park Service. The near-boiling temperature and moderate access make this a significant but hazardous thermal feature.
The springs flow in hydrothermal landscape at moderate elevation within Yellowstone's vast interior, surrounded by siliceous deposits and thermal runoff channels characteristic of active geyser basins. The setting receives 29 inches of annual precipitation with 151 inches of snowfall, creating harsh winter conditions that persist from November through April. The springs lie within Gallatin County's portion of the park, likely near the Firehole River drainage where multiple thermal groups cluster. Sparse vegetation adapted to thermal runoff surrounds the immediate discharge zone, with lodgepole forest dominating areas beyond thermal influence.
Documentation of River Group appears in systematic geothermal surveys preceding the 1980 NOAA publication, with the name likely referencing proximity to the Firehole River or one of its tributaries. Early park rangers and geologists cataloged the feature as road access developed through the Lower Geyser Basin in the early 20th century. National Park Service maintains the springs in natural state without boardwalks or development. The springs remain relatively unknown to casual visitors due to the off-road location requiring a walk.
Visit from June through September when access trails are snow-free and park roads are open. Park entrance fees apply. The 2.6-kilometer round-trip walk follows thermal terrain where staying on designated paths is mandatory for safety. The 196-degree temperature causes severe burns on contact and unstable ground poses additional danger. Big Springs Group Area in Idaho lies 34 kilometers away with reservable group camping. Bring water, sun protection, bear spray, and layers for variable conditions. Combine with more accessible Lower Geyser Basin features.
Is River Group worth visiting?
Best for
- Observing powerful hot springs
- Overnight camping trips
- Winter soaking with dramatic temperature contrast
Not ideal for
- Casual soaking
Overview Big Springs Group Area is located 22 miles south of West Yellowstone, Montana in beautiful Island Park, Idaho at an approximate elevation of 6,300 feet. Visitors love Island Park for its world-class fishing and outstanding scenery and wildlife viewing opportunities.Recreation Big Springs is the headwaters of Henry's Fork and is one of the largest springs in the country. Henry's Fork is considered one of the best fly-fishing streams in the nation. Fishermen cast for rainbow and brook...